Develop Bugs

[Q] Issue after ICS update - Phone freezing

After the ICS update on my non-rooted phone, the phone seems to be freezing
up and becoming unresponsive. After a while it looks like the radio "resets", all
the icons disappear in the top bar (signal, wifi, data) and it shows no service.
Then slowly one by one they all come back and I can use the phone again.
Sometimes I receive the "System is not responding" dialog box, but not always.
There is not one particular program it is doing this in, it can be something as
simple as pulling down the notification bar that will cause the freeze.
Any suggestions are appreciated, I couldn't find anyone else with the same issue.
Thanks.

Try:
Turn off phone
Take out SIM
Put SIM back
Turn on
I've had my phone act weird with respect to signal, wifi and data when this was the issue. Worth a shot, at the very least.

Digital_Buddha said:
Try:
Turn off phone
Take out SIM
Put SIM back
Turn on
I've had my phone act weird with respect to signal, wifi and data when this was the issue. Worth a shot, at the very least.
Click to expand...
Click to collapse
Thank you for the response.
Tried this and had the system is unresponsive issue right on reboot. If I do a
factory reset, does it reset to the current firmware or what was originally on the
phone (probably a really stupid question). I wonder if some other program isn't
ICS compatible and is doing something in the background. Doesn't look like
anyone else is having this same issue.

jdscully said:
Thank you for the response.
Tried this and had the system is unresponsive issue right on reboot. If I do a
factory reset, does it reset to the current firmware or what was originally on the
phone (probably a really stupid question). I wonder if some other program isn't
ICS compatible and is doing something in the background. Doesn't look like
anyone else is having this same issue.
Click to expand...
Click to collapse
If you do a factory reset and it was the standard Kies legit update from Tmo, it won't downgrade your phone - will just re-install a fresh copy of your ICS. Did you do a restore of apps from your last version (gb?) with data? That could cause problems I would think..

VoiD_Dweller said:
If you do a factory reset and it was the standard Kies legit update from Tmo, it won't downgrade your phone - will just re-install a fresh copy of your ICS. Did you do a restore of apps from your last version (gb?) with data? That could cause problems I would think..
Click to expand...
Click to collapse
Yes I did the legit update on Kies, standard stock phone un-rooted.
Do I need to backup pictures before the reset, its been a while since
I had to do this.
At this point, I think its worth a try to wipe it clean and clear out all the
data.

jdscully said:
Yes I did the legit update on Kies, standard stock phone un-rooted.
Do I need to backup pictures before the reset, its been a while since
I had to do this.
At this point, I think its worth a try to wipe it clean and clear out all the
data.
Click to expand...
Click to collapse
wipe the dalvik cache and cache then reboot

I did a factory reset and that solved the issue.
Thanks for all the assistance.

I've done a factory reset and wiped the cache more than once already and i still get a force close or unresponsive, enough that its really irritating me now. Any advice? And also, when texting, the typing responds very slow.
Sent from my SGH-T989 using XDA

itsdamage said:
I've done a factory reset and wiped the cache more than once already and i still get a force close or unresponsive, enough that its really irritating me now. Any advice? And also, when texting, the typing responds very slow.
Sent from my SGH-T989 using XDA
Click to expand...
Click to collapse
Are you letting it sit for like 10 minutes during first boot after factory reset then reboot again before setting up. Its likely that some scripts are running from the initial installation and you need to let it rot until its done..

I did exactly that, thanks for the advice. Hoping that may fix the problem. I wiped the cache and factory reset, then let the phone sit for a good while before going through the play store and re-installing everything.

This issue just resurfaced again. The last 2 days I am getting the freezing, radio reboot and android process not responding.
No one else having this issue?

I think I'm in the same boat. I was stock GB, and just did the mini OTA update (which was great). A few days later ICS became available via Kies from T-Mobile, and I "upgraded".
Since the upgrade my phone is laggy, screen is significantly less responsive and also my battery life is less than before.
I have NOT done a factory reset of my phone yes (plan on doing that today), but even with that I have read that performance does not improve.
Ideally, I would love to return back to the stock tmobile gb firmware. However, even after literally 2 hours of reading I can't find the "how-to" and files I need.
I would appreciate any assistance.

t989 chip lags
ive notice this happen on my tmobile galaxy s2. i think it has to do with the Qualcomm chip on tmobiles stock roms.
When i had sprint i bought my girlfriend a galaxy s2 on the sprint network which runs the samsung exynos chip. She never complained about any lag or freezing whatsoever. I then left sprint because of their garbage network and joined tmobile.
bought 2 galaxy s2s and i noticed the lag almost immediately. The phone has random lag spikes as well as freezing and force closes. It had it on stock gingerbread and it has it on stock ICS too.
My girlfriend complains about freezing all the time so i decided to root her phone too. Right now im testing DarkSides v7 rom and if its pretty good in performance i will flash her phone with it too. So far it has been pretty snappy and everything works.

jdscully said:
This issue just resurfaced again. The last 2 days I am getting the freezing, radio reboot and android process not responding.
No one else having this issue?
Click to expand...
Click to collapse
Yes i have the exact same problem...and the clock goes off too...if i don't reboot then this will keep happening...if you go into settings then development settings and tick off only let 4 process run in the background it should stop...try it and let me know
Sent from my SGH-T989 using xda premium

tonydetroit said:
I think I'm in the same boat. I was stock GB, and just did the mini OTA update (which was great). A few days later ICS became available via Kies from T-Mobile, and I "upgraded".
Since the upgrade my phone is laggy, screen is significantly less responsive and also my battery life is less than before.
I have NOT done a factory reset of my phone yes (plan on doing that today), but even with that I have read that performance does not improve.
Ideally, I would love to return back to the stock tmobile gb firmware. However, even after literally 2 hours of reading I can't find the "how-to" and files I need.
I would appreciate any assistance.
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1668502
follow that first post. i went through exactly the same problems and found this guide and am now happy again and running stock GB on my Galaxy S2.
Because you are on stock ics (im guessing you are..), you can just follow that guide and flash the UVLDE update.

Yes clock resets to standard standard time.. I already did a factory reset and worked done for a couple weeks. My wife has same phone and she is getting the freeze ups now.

jdscully said:
Yes clock resets to standard standard time.. I already did a factory reset and worked done for a couple weeks. My wife has same phone and she is getting the freeze ups now.
Click to expand...
Click to collapse
Yeah really sux...it's random..I'm using a custom kernel and still having that problem....
Sent from my SGH-T989 using xda premium

Yup here too. Almost reminds me of XP. Really ticking me off & it never happened on gingerbread. Rooted now & before I'm on rogers 4.0.4. wondering if there's going to be fix? Haven't seen if Google / rogers /at&t have commented?
Sent from, The Eclectic Chair.

I'm getting the freezes as well even after doing a factory reset.
It sucks, I'm waiting for cyanogen to release a stable release and then I'm switching.

djtheraven said:
Yes i have the exact same problem...and the clock goes off too...if i don't reboot then this will keep happening...if you go into settings then development settings and tick off only let 4 process run in the background it should stop...try it and let me know
Sent from my SGH-T989 using xda premium
Click to expand...
Click to collapse
Thanks for the suggestion, I'll give it a try. But it really shouldn't be necessary on a phone that's got more going for it than the stock nexus that 1st came out with ics.
There's something else going on.
Sent from, The Eclectic Chair.

[Q] Screen timeout not working?

I have stock (rooted then unrooted) JC with APEX launcher. It sounds crazy but my phone screen doesn't turn off by itself.
There are several times I woke up in the morning to find out my phone screen was on overnight (screen must have turned on when I plugged in the charger). Right now, I turned on my phone just to see if the screen would turn off at 1) lock screen 2) apex home screen. neither works.
I tried all these with different timeout settings (15 sec, 30 sec, 1min, etc.).
Anyone having the same problem? Anyone with solution?

kg1128 said:
I have stock (rooted then unrooted) JC with APEX launcher. It sounds crazy but my phone screen doesn't turn off by itself.
There are several times I woke up in the morning to find out my phone screen was on overnight (screen must have turned on when I plugged in the charger). Right now, I turned on my phone just to see if the screen would turn off at 1) lock screen 2) apex home screen. neither works.
I tried all these with different timeout settings (15 sec, 30 sec, 1min, etc.).
Anyone having the same problem? Anyone with solution?
Click to expand...
Click to collapse
Had that issue with siii, reboot fixed it, have you tried reboot?

mattsm said:
Had that issue with siii, reboot fixed it, have you tried reboot?
Click to expand...
Click to collapse
Yes rebooting always solves the issue but can i get a permanent fix? It's kinda annoying. I'm on GT-N7100 JB4.1.2 and i've never rooted.

Kinda glad i wasnt the only one having this issue. Happened to me yesterday. Kinda freaked me out as i dont want anything wrong with this phone.. reboot worked for me yesterday.
On a side note.. every once in awhile my youtube app goes to **** and it refuses to play videos.. it says network error yet i can do everything else... reboot fixes that too.
Sent from my big big BIG iphone killer.

morbiddevil82 said:
Kinda glad i wasnt the only one having this issue. Happened to me yesterday. Kinda freaked me out as i dont want anything wrong with this phone.. reboot worked for me yesterday.
On a side note.. every once in awhile my youtube app goes to **** and it refuses to play videos.. it says network error yet i can do everything else... reboot fixes that too.
Sent from my big big BIG iphone killer.
Click to expand...
Click to collapse
Yeah no kidding. I really don't want anything to go wrong with my phone. But unfortunately it has been kinda buggy from day one. A minor issue with the stock keyboard was solved after the 4.1.2 update. But the weird error with the Quick Commands thingy ain't getting sorted out, even after the update. Of course, reboots also never help.

Oh someone please tell me what's wrong with my phone The screen timeout thingy ain't working An unattended message or missed call means my display stays on till I turn it off manually A reboot would solve the issue but then it would come back again. Any permanent fix? Please help I've never rooted my phone.
Sent from my GT-N7100 using xda app-developers app

Uninstall any apps that keep your screen on or go through the apps list and kill everything individually. imediashare keeps my screen on after I'm done using it cause it still wants to stay running.

w7excursion said:
Uninstall any apps that keep your screen on or go through the apps list and kill everything individually. imediashare keeps my screen on after I'm done using it cause it still wants to stay running.
Click to expand...
Click to collapse
Lemme try doing that
Sent from my GT-N7100 using xda app-developers app
---------- Post added at 09:48 PM ---------- Previous post was at 09:06 PM ----------
w7excursion said:
Uninstall any apps that keep your screen on or go through the apps list and kill everything individually. imediashare keeps my screen on after I'm done using it cause it still wants to stay running.
Click to expand...
Click to collapse
Went through the 124 apps that had WAKE_LOCK permission. (Used Permission Explorer). If I count out the recently installed apps before which the problem had originally started, I guess there aren't any suspicious apps. Oops Aren't there any apps that forces the display to go off? ^_^
Sent from my GT-N7100 using xda app-developers app

I'm just throwing it out there by maybe go into recovery and fix permissions? Clear the cache? Factory reset if all else fails I guess.

w7excursion said:
I'm just throwing it out there by maybe go into recovery and fix permissions? Clear the cache? Factory reset if all else fails I guess.
Click to expand...
Click to collapse
I didn't want to do a factory reset Anyways, thank you Lemme see what I can do
Sent from my GT-N7100 using xda app-developers app

kg1128 said:
I have stock (rooted then unrooted) JC with APEX launcher. It sounds crazy but my phone screen doesn't turn off by itself.
There are several times I woke up in the morning to find out my phone screen was on overnight (screen must have turned on when I plugged in the charger). Right now, I turned on my phone just to see if the screen would turn off at 1) lock screen 2) apex home screen. neither works.
I tried all these with different timeout settings (15 sec, 30 sec, 1min, etc.).
Anyone having the same problem? Anyone with solution?
Click to expand...
Click to collapse
Hi. Having the same problem... However, i believe it has to do with the feature that prevents screen from turning off if you are looking at it. Try to turn it off and on. Perhaps it will help.
If you continue to have problems, just disable that feature... it is a good adon, but having the screen turn off tose battery is more important.
Hope it helps.
Let us know if it worked out

[Q] samsung galaxy note 2 getting stuck

2 months back I uodated my phone to android 4.3 but from last 2 weeks it is randomly getting stuck during use or sometimes even while im sleeping and the phone is on table and when it is stuck I can't use it can't unlock it. No nothing. I have to take out the battery and insert it back to restart it. And while it is stuck I can't receive calls and sms. I have donr factory restore. It help for like 3 days but the issue is bck. Can anyone tell what is the fault and how to fix it?

Did u find any solution?

I used to have som issue like that after updating my s2 years ago, but only when I had a security to unlock, like face unlock or passcode... some times it just froze and did nothing...
Do you have any kind of lockscreen security?

andresousapirikito said:
I used to have som issue like that after updating my s2 years ago, but only when I had a security to unlock, like face unlock or passcode... some times it just froze and did nothing...
Do you have any kind of lockscreen security?
Click to expand...
Click to collapse
No... no security.
and it even got stuck once while using the ph

Are you on a stock Rom? Have any custom recovery?
Have you tried factory reset ?
Sometimes errors occur and resetting seems Rom fix...
Sent from my GT-N7105 using xda app-developers app

andresousapirikito said:
Are you on a stock Rom? Have any custom recovery?
Have you tried factory reset ?
Sometimes errors occur and resetting seems Rom fix...
Sent from my GT-N7105 using xda app-developers app
Click to expand...
Click to collapse
Yes im on stock rom
and I have factory reset the phone.
Phone was fine for 3 days but the issue is back.
it stucks every 2 hours later almost

sunnyjanu said:
Yes im on stock rom
and I have factory reset the phone.
Phone was fine for 3 days but the issue is back.
it stucks every 2 hours later almost
Click to expand...
Click to collapse
Users have reported that sometimes when they use a advance task manager/killer the lock screen freezes...
Some reports also mention some apps that cause that bug...
And when you reboot it behave well for sometime, maybe it is due to an app you've installed that isn't open yet.
Did you put widgets on the lockscreen?

andresousapirikito said:
Users have reported that sometimes when they use a advance task manager/killer the lock screen freezes...
Some reports also mention some apps that cause that bug...
And when you reboot it behave well for sometime, maybe it is due to an app you've installed that isn't open yet.
Did you put widgets on the lockscreen?
Click to expand...
Click to collapse
Its not getting stuck as it rebots it stuck like 2 hours later I restart it after it is stuck.
n no lockscreen widgets

sunnyjanu said:
Its not getting stuck as it rebots it stuck like 2 hours later I restart it after it is stuck.
n no lockscreen widgets
Click to expand...
Click to collapse
yes it was that I was trying to explain but I'm not very good at english xD
Check your apps, lots and lots of reports of the same issue are fixed after useres remove task killers, and sometimes even weather apps.

problem with keyboard htc one m8

after i update phone to 5.0.1 sometimes i have a problem with keyboard ,randomly they stopped work ,
when i tapping the place and keyboard should appear nothing happens.
after one or two minut going back :/
any experience with this,,
thank guys

i noticed the same thing...i had to reboot the phone few times...

Same issue here!
You can wait till christmas, but nothing works to get your keyboard back..except booting..

Yes same issue here. I've mentioned it not long after the Developer Edition received the OTA.
It's not even something that we can recreate, it's just completely random. It stays that way until a reboot and then it's fine again. Very irritating.

try to clear data in app settings, that work for me :/ 4 days no problems

vahica said:
try to clear data in app settings, that work for me :/ 4 days no problems
Click to expand...
Click to collapse
do other keyboards work?

vahica said:
try to clear data in app settings, that work for me :/ 4 days no problems
Click to expand...
Click to collapse
not an expert here; can you explain how/where/what?

Donky1973 said:
not an expert here; can you explain how/where/what?
Click to expand...
Click to collapse
go to ;
settings-apps-all-htc sense input- clear data

mxisme said:
do other keyboards work?
Click to expand...
Click to collapse
They've never worked for me... unfortunately.

vahica said:
go to ;
settings-apps-all-htc sense input- clear data
Click to expand...
Click to collapse
ah...the sense-input thing...makes sense...thanx!

No problems here.

Deleted cache but problem still occurs...randomly of course.... not that many times anymore though..

Donky1973 said:
Deleted cache but problem still occurs...randomly of course.... not that many times anymore though..
Click to expand...
Click to collapse
Hello, the same problem with the keyboard .On any firmware, I have 6 different firmware problem persists.
p . s . TEL Verizon

Still having this damn problem.. Anyone know if it's isolated to Verizon phones? I'm on Verizon 5.0.1 stock, both the HTC and Google keyboard do it. Completely random, about once every day to 2-3 days. So annoying.

I'm having trouble with my HTC one M8
vahica said:
after i update phone to 5.0.1 sometimes i have a problem with keyboard ,randomly they stopped work ,
when i tapping the place and keyboard should appear nothing happens.
after one or two minut going back :/
any experience with this,,
thank guys
Click to expand...
Click to collapse
I had a problem with the keyboard lagging which got worse after the lollipop update, I was considering a warranty claim or rooting the phone and then the microphone packed in and the decision was made, I called the network who advised me to send it to HTC for repair which I did, it also had a few sync problems too, I asked the technical support guy about this problem and he said it would have to be reflashed, I sent it to them and they did the work, replacement microphones, replacement receiver, replacement lower board, replacement rubber something or other which I was told is something under the screen, replacement camera and a few others and of course it was flashed, I got it back after 8 days expecting my otherwise brilliant phone to be as it should be as I have come to expect from HTC, I switched it on and did the initial stages of making it work, I let it restore the last backup I made (off the phone with faults) which reported had failed but it started to restore the backed up apps, settings and my contacts, everything restored to how I had it before minus a couple of apps and a few notification settings, I have been using it for 2 days now however the keyboard has not been fixed by flashing it, unless the errors could have been brought in by the restoration? I have experienced the screen freeze and start jumping, jumping to the all open apps page, keyboard lag, keyboard is inaccurate, I went into the EE shop and they said that it should go back to HTC again, I haven't tried to hard reset it and go back to the factory settings and not restore the backup image this time, I've never had any problems with the 3 HTC phones I've owned, it is a good phone otherwise

Damn, I just went back to Dev Edition and sure enough it happened to me. Has this ever been fixed? This is way too annoying for me.

Possible Fix
For what it's worth, I went into App Manager to clear the Sense Input data as suggested by a previous poster (thank you) but did not have a 'Clear Data' button. There was a 'Settings' button though where I was able to turn off HTC Sense Input, after which my Swype keyboard immediately started working again. First time I've been able to resolve this SUPER annoying issue without rebooting the phone. Time will tell if it's a real fix; I'll update this post if not.
Phone is a brand new M8, still on stock 5.0.1

Random reboots after 6.0.1 update?

I used the OK1 tar through ODIN, then did a factory reset then took the 6.0.1 update. Yesterday I got probably 2 random reboots and now this morning I have had 4 one after another probably 5 minutes apart from each other. I am using the I heart radio app to listen to a local radio show and the phone keeps rebooting. I thought maybe it was the app causing this so I uninstalled and reinstalled it and the phone keeps rebooting. I recently purchased a replacement Anker battery and have been using it for a week now with no issues. Anyone have something similar like this happening? Anyway to fix this besides the obvious wipe everything clean and try again?
EDIT: It's the app, others are reporting the same issue with newer phones running Marshmallow.

Same problem. Sprint is getting me a replacement
Sent from my Nexus 5 using Tapatalk

Same here with I Heart Radio app.
xbmoyx said:
I used the OK1 tar through ODIN, then did a factory reset then took the 6.0.1 update. Yesterday I got probably 2 random reboots and now this morning I have had 4 one after another probably 5 minutes apart from each other. I am using the I heart radio app to listen to a local radio show and the phone keeps rebooting. I thought maybe it was the app causing this so I uninstalled and reinstalled it and the phone keeps rebooting. I recently purchased a replacement Anker battery and have been using it for a week now with no issues. Anyone have something similar like this happening? Anyway to fix this besides the obvious wipe everything clean and try again?
EDIT: It's the app, others are reporting the same issue with newer phones running Marshmallow.
Click to expand...
Click to collapse
Same Here...

Mine does as well!
Sent from my SM-N910P using XDA-Developers mobile app

I don't use the app, and my phone does not restart.

random45 said:
I don't use the app, and my phone does not restart.
Click to expand...
Click to collapse
Correct, it's the app causing the reboots. I have reverted back to LP for now since there's no issues.
Sent from my SM-N920P using XDA-Developers mobile app

Samsung Note 4 reboots randomly in IHeart app
Mine has shut down automatically when listening to IHeart App, but not with other apps, so I assume it's that app that is causing it. I did uninstall & reinstall app. Did not help. I cleared system cache. Did not help. I initially did soft reboot with battery out and in after 10 seconds. Did not help. I have not contacted sprint yet, but that is my next option. Any help would be appreciated.

KarenLMarcum said:
Mine has shut down automatically when listening to IHeart App, but not with other apps, so I assume it's that app that is causing it. I did uninstall & reinstall app. Did not help. I cleared system cache. Did not help. I initially did soft reboot with battery out and in after 10 seconds. Did not help. I have not contacted sprint yet, but that is my next option. Any help would be appreciated.
Click to expand...
Click to collapse
If your set on remaining on MM, use a different radio app and uninstall IHeartRadio for now until they fix the problem.
Sent from my SM-N920P using XDA-Developers mobile app

KarenLMarcum said:
Mine has shut down automatically when listening to IHeart App, but not with other apps, so I assume it's that app that is causing it. I did uninstall & reinstall app. Did not help. I cleared system cache. Did not help. I initially did soft reboot with battery out and in after 10 seconds. Did not help. I have not contacted sprint yet, but that is my next option. Any help would be appreciated.
Click to expand...
Click to collapse
FYI if you download the IHeartRadio app through the Galaxy Apps store it doesn't reboot the device.
Sent from my SM-N910P using XDA-Developers mobile app

I uodate Flashed N910p With 6.0.1 now phone is restarting randomly after 10 to 16 seconds. Fkashed with another firm with 5.1.1 But still restarting. Any body please help.

I have this problem but don't use that app. ....
For me I am getting the soft reboot every 20 mins or so... bloody annoying! !!

MSK1 said:
I have this problem but don't use that app. ....
For me I am getting the soft reboot every 20 mins or so... bloody annoying! !!
Click to expand...
Click to collapse
Rooted? Are you seeing a pop-up for the reboot (prompt)? Screenshots or logs?
How did you upgrade to marshmallow? What update are you on? What ROM are you running? Custom kernel? If rooted stock with custom kernel, have you fully removed ItsOn and Knox? Did you wipe or factory reset? Include your steps to get an idea of what is causing the reboot issue.
(If stock un-rooted, you may have some residual data from Lollipop. If rooted with custom kernel, you may have files from ItsOn or Knox causing issues. Basically, un-rooted and rooted have their own set of concerns. Need more info to offer suggestions.)
Sent from my SM-N910P using Tapatalk

samep said:
Rooted? Are you seeing a pop-up for the reboot (prompt)? Screenshots or logs?
How did you upgrade to marshmallow? What update are you on? What ROM are you running? Custom kernel? If rooted stock with custom kernel, have you fully removed ItsOn and Knox? Did you wipe or factory reset? Include your steps to get an idea of what is causing the reboot issue.
(If stock un-rooted, you may have some residual data from Lollipop. If rooted with custom kernel, you may have files from ItsOn or Knox causing issues. Basically, un-rooted and rooted have their own set of concerns. Need more info to offer suggestions.)
Sent from my SM-N910P using Tapatalk
Click to expand...
Click to collapse
Not rooted.
Best description I can give is that at night when my nighclock is on. ...
the light on back and menu button will come on...
simultaneously the my note edge message will flash on the edge replacing the night clock for a few seconds (this is the background soft reset I think)...
the phone is not functional for these few seconds ie if i press a button to wake screen up then it will wait and hi locker won't let fingerprint work after this happens.
Rinse and repeat every few minutes.

MSK1 said:
Not rooted.
Best description I can give is that at night when my nighclock is on. ...
the light on back and menu button will come on...
simultaneously the my note edge message will flash on the edge replacing the night clock for a few seconds (this is the background soft reset I think)...
the phone is not functional for these few seconds ie if i press a button to wake screen up then it will wait and hi locker won't let fingerprint work after this happens.
Rinse and repeat every few minutes.
Click to expand...
Click to collapse
Not an answer but how many of these applications you mention are third party applications?
Typically, lock-screen is only available a few seconds and screen is forced off; deep sleep may eventually occur but you have only a small amount of control to prevent deep sleep; that's usually a good thing. These apps may not be remaining fully functional when conflict results in screen going off unexpectedly or deep sleep trying to save your battery kicks in.
Dunno what compatibility is expected with multiple apps active while trying to keep lock-screen on or wake frequently? My use of lock-screen apps is limited to my third party alarm. I'm happy that it wakes to alarm; I can snooze and allow screen to go off quickly and wake for snooze until I dismiss the alarm (without having to unlock screen). That's about all I'm familiar with lock-screen applications.
My only suggestion would be to try to limit the third party apps used in lock-screen mode to find the maximum compatibility. Dunno, if those are third party applications conflicting, it's just a guess.
Maybe one or more of these applications aren't fully compatible with marshmallow?
On the subject of waking phone being slow, I think it was reported by non rooted users that factory reset cured that for some users. It's possible that if phone wasn't factory reset coming to Marshmallow from Lollipop, that factory resetting now would help.
Sent from my SM-N910P using Tapatalk

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