Develop Bugs

Black screen aka black death

Seems like a lot of people are facing problem waking up the phone resulting in getting black screen and nothing else.
I faced the same problem too that is why I decided to create a new thread specifically on this.
Let's share what caused our phone to go into coma based on our observations so that in time, the root of the problem can be traced.
Based on my observation, when my phone is left idle for some time, say 1-2hrs, it tends to become sluggish and setcpu will stuck at max or min value (Yes! sluggish even when stuck at max value!). Given long enough idle time, it will fail to wake up (e.g. every morning when i wake up after 7-8hrs of idle time).
I was using OpenDesire v4.0.10 and just changed to v4.0.15 to see if it still exist. I have setcpu set on 1075max 245min (ondemand) and 245max 245min (ondemand) when screen off. Also, using task manager.
Please share your observations and phone settings (ROM, versions, setcpu, task manager and others)

have you tried removing setcpu?

cgrec92 said:
have you tried removing setcpu?
Click to expand...
Click to collapse
Nope, but in OpenDesire thread, people without setcpu experienced the same thing. Do you have such problem?

I noticed using setcpu does make the phone sluggish. when uninstalled problem was solved.
Installed undervolt & got better batt life.
Sent from my HTC Desire using XDA App

Perhaps, a more tailored topic title will help all readers understand what you're talking about.
However, HAVS kernels is the only common factor and SetCPU is not the cause.
And, my two cents, I don't think this issue deserves a dedicated thread since is specific to a single kernel flavor.

shai.bosse said:
I noticed using setcpu does make the phone sluggish. when uninstalled problem was solved.
Installed undervolt & got better batt life.
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
what is this undervolt you talking about? mind elaborating a little?

@ngel said:
Perhaps, a more tailored topic title will help all readers understand what you're talking about.
However, HAVS kernels is the only common factor and SetCPU is not the cause.
And, my two cents, I don't think this issue deserves a dedicated thread since is specific to a single kernel flavor.
Click to expand...
Click to collapse
I created a specific thread on this topic because there are many people out there experiencing this bug and there is no dedicate thread to discuss it. I assume you are not facing this problem because otherwise you would understand the pain and frustration of encountering this problem repeatedly

webber2109 said:
what is this undervolt you talking about? mind elaborating a little?
Click to expand...
Click to collapse
Undervolt is a kernel mod that you install and it lowers the cpu drain by setting it to use lower volt values on each cpu freq. This cause it to stay cooler too.
Look for it in this forum. [Kernel] undervolt
Sent from my HTC Desire using XDA App

I am suffering from this once per day on Defrost and OD so I suspect its kernal related. I am running the default HAVS kernel at the stock 998 frequency. I uninstalled SetCPU yesterday and had a lock this morning ( Defrost 4.1 ). The notification LED was flashing orange. So SetCPU is not causeing the problem. I have swapped over to SVS so I will report back on how that goes.

webber2109 said:
Nope, but in OpenDesire thread, people without setcpu experienced the same thing. Do you have such problem?
Click to expand...
Click to collapse
I use OpenDesire 4.0.10, then 4.0.15, then 4.0.16, each release for at least 3 days, and not for once have I encountered such "black death"....no setCPU of course.
Care to elaborate what apps you have there ?

webber2109 said:
I created a specific thread on this topic because there are many people out there experiencing this bug and there is no dedicate thread to discuss it. I assume you are not facing this problem because otherwise you would understand the pain and frustration of encountering this problem repeatedly
Click to expand...
Click to collapse
That issue is relative to OpenDesire and DeFroST ROMs only, and when they use a particular kernel version (HAVS) on selected CPUs, so I continue to think that it'll be eventually sorted out by the respective developers and/or Kali- and the kernel team; those guys do monitor the ROMs threads so they're already aware of the issue.
And yes, I suffered the issue twice, as I wrote more times in the DeFroST thread. "Pain" (panic?) and "frustration" sound a bit strange to me, when dealing with overclocked, custom, highly tweaked cooked ROMs. If a reboot scares you, head for a stock HTC ROM and you'll be fine.

I was worried I was the only one who had this. Thread title isn't that helpful for people seeking advice on it though. Get this after every reboot for about a minute until everything is back to normal.
Had the sluggish issue when using YouTube after about 20/30 mins, other than that I've had no lags.
Using 4.0.16
Sent from my HTC Desire

Double post

I got this on a svs kernal, so its not just restricted to havs. I had 1300 svs installed. With setcpu. Done the same with 1267 svs.

I've also had this issue on SVS kernels, was also having a series of hard resets last night - have rolled back to an earlier version of my favourite ROM flavour for now.

Never experienced anything like that...Although there are times that my Desire's performance would remind me of the bad old Diamond days,where patience was a virtue(well,not a virtue,but a money saving method!throwing your phone to the wall with your full strength after it frustrates you with being slow is known to be a costly process! ).Seems to be some apps running in the background...Maybe if your phone recovers after it without a reboot you can check if any apps use a larger than normal amount of ram.Other than that...Well,god is almighty and people experiencing epiphanies are known to work wonders through the ages!
And something completely off-topic(sorry about that).When using an undervolted rom/kernel you are not able to overclock to values as high as when using a normal-volted(is the word right?I dunno...) rom/kernel,right?I mean,what would happen if someone tried to overclock to 1382MHz(I know,I like the limits) using an undervolted kernel?And finally,how does this all apply to the hardware?Does UV affect the CPU's health like overclocking or something like that?
Thanks a lot!

I've had it on OpenDesire 4.0.10 and 4.0.15 a few times. Stopped happening when I stopped using profiles and defaulted back to to 998/ondemand.
Will try running it on 998/interactive for a while and see what happens.

No lockups after SetCPU to ondemand. OD 4.0.15.
Sent from my HTC Desire using XDA App

Separate thread IS useful, otherwise replies get lost in ROM threads where the focus is not specifically on this problem.
I too had this issue three times. DeFroST on all occasions, versions 3.x iirc. Never tried the HAVS kernels, just plain default what is shipped with the ROM (SVS @ 12xx Mhz?). Also SetCPU'd it, have not yet bothered to try and turn that off yet. SetCPU keeps it at 995 Mhz max, interactive governor, while switching to powersave while asleep.
Issue happened twice while browsing (possibly with Flash ads on the page by accident) and the power state switching (i.e. turn the device off quickly while running for train, afterwards reading for 2 minutes again, etc). Third time it happened while tethering my internet connection to my laptop.
Hth

I had this problem few times a day when I upgraded OD to .10 and the new ADW on the same day.
Then I restore back the old OD with old ADW, then no problem.

CPU power

Hi there, the current CPU max for Desire HD on stock is 1GHz.
If we change to other custom ROMs and it allows us increase the normal 1GHz to say, 1.5GHz.. (overclocking?) will it damage our hardware?
Cause as far as I know the software should be supported with a powerful hardware as well.

Overclocking always has the possibility to damage the cpu. And as not all cpu's are the same, if you want to overclock, the best way is to start of slowly say 1.1ghz. And keep stepping it up slowly. If your device begins to get unstable, go back a step, and you will pretty much know the level of your cpu fyi ive had mine overclocked to 2ghz and it seemed to run fine, although i didnt keep it at that level for long. lol
Sent from my Desire HD using Tapatalk

I've been using minne over clocked at 1.5ghz since the day I bought it and I've not noticed anything as far as hardware failure. Being a computer technician I'm constantly trying to run what I have at the fastest rate without fail. I've not felt any overheating and per temps I've only seen about a 5-8°c increase over another user at work on the same ROM.
Sent from my Desire HD using XDA App

I have been running mine DHD at 1,2 for some time and ofc there is a chance that the CPU fries, because of the OC, but I don't think the chance is very big.
But please remember that the warranty of the phone dosn't cover overclocking

Hmm.. ok. Thanks for the advice.
I shall consider carefully before doing anything. Currently I am at only 1190MHz. Lol.
Anyway thanks again.

Well,I am running a really nice 1.8GHz,stable and fast as hell.Never noticed any overheating.
What most people should bear in mind is that the physical limits of our cpus aren't the ones that the manufacturers tell us they are with their spec sheets.Almost always,cpus are tested in higher clock speeds than what they are sold with,just to be stable and safe.
And one more thing.Correct me if I'm wrong,but doesn't the Flyer share the same cpu as the DHD?Cause it runs @1.5GHz stock.If they have the same cpu,guess what this means for us!
Sent from my Desire HD using XDA App

In my, I can use up to 1190, higher - websites in flash crash
ROM: Android Revolution HD 2.0.16
Kernel: Buzz OC/UV 1.61Ghz
What is a good program to test CPU stability ?

alpine17 said:
In my, I can use up to 1190, higher - websites in flash crash
ROM: Android Revolution HD 2.0.16
Kernel: Buzz OC/UV 1.61Ghz
What is a good program to test CPU stability ?
Click to expand...
Click to collapse
In setcpu,go to the info tab and do a stress test for some minutes.If it doesn't crash or anything you're good to go!

Thanks.
I did two ten-minute tests in SetCPU, the first 1,53Ghz and second 1.61Ghz, both without errors.
Anyone have any idea ?

Lol. Guess I will just try increasing the GHz slowly. Trying 1.3 now

I dived straight in, and set it to 1.5. No problems so far. Done a stress test successfully. But is there any need to increase the minimum level?

alpine17 said:
In my, I can use up to 1190, higher - websites in flash crash
ROM: Android Revolution HD 2.0.16
Kernel: Buzz OC/UV 1.61Ghz
What is a good program to test CPU stability ?
Click to expand...
Click to collapse
If you clocked your cpu too high, your complete phone will freeze. That means the only possibility to restart it is by pulling the battery.
If your browser closes suddenly without any notification, it's app related and not due to an overclocked cpu.
Sent from my Desire HD using Tapatalk

Can i overclock my HTC Desire HD when I still have the standard vodafone rom on it?
Can someone tell me how to do this pls?
Thnx

Flussen said:
If you clocked your cpu too high, your complete phone will freeze. That means the only possibility to restart it is by pulling the battery.
If your browser closes suddenly without any notification, it's app related and not due to an overclocked cpu.
Sent from my Desire HD using Tapatalk
Click to expand...
Click to collapse
You're right pal.I don't remember who asked,and am too bored to look for it right now,but it also happened to me with stock unrooted rom.
benno4403 said:
Can i overclock my HTC Desire HD when I still have the standard vodafone rom on it?
Can someone tell me how to do this pls?
Thnx
Click to expand...
Click to collapse
Well,to overclock you'll need a custom kernel,which means you'll have to be rooted and have at least clockworkmod recovery installed.ENG and Radio S-OFF are recommended.

Flussen said:
If you clocked your cpu too high, your complete phone will freeze. That means the only possibility to restart it is by pulling the battery.
If your browser closes suddenly without any notification, it's app related and not due to an overclocked cpu.
Click to expand...
Click to collapse
ok I know, but I do not understand why when I enter the page, for example: speedtest, after a few seconds the phone is completely frozen (o / c) 1.22Ghz
I watch movies, play games, do tests, benchmark, etc. (o / c) 1.22 Ghz - 1.53Ghz. Everything is ok.
just a few seconds in the flash player and death:

Did someone try do downclock CPU to say 800MHz. Will it improve battery life?

benno4403 said:
Can i overclock my HTC Desire HD when I still have the standard vodafone rom on it?
Can someone tell me how to do this pls?
Thnx
Click to expand...
Click to collapse
Yes you can, you need to root, s-off and install a custom kernel first though.
Sent from my Desire HD using Tapatalk

catevs said:
Did someone try do downclock CPU to say 800MHz. Will it improve battery life?
Click to expand...
Click to collapse
Yes underclocking will improve battery like, at the cost of performance
Sent from my Desire HD using Tapatalk

alpine17 said:
ok I know, but I do not understand why when I enter the page, for example: speedtest, after a few seconds the phone is completely frozen (o / c) 1.22Ghz
I watch movies, play games, do tests, benchmark, etc. (o / c) 1.22 Ghz - 1.53Ghz. Everything is ok.
just a few seconds in the flash player and death:
Click to expand...
Click to collapse
Flash it quite a cpu intensive task, thats why
Sent from my Desire HD using Tapatalk

alpine17 said:
ok I know, but I do not understand why when I enter the page, for example: speedtest, after a few seconds the phone is completely frozen (o / c) 1.22Ghz
I watch movies, play games, do tests, benchmark, etc. (o / c) 1.22 Ghz - 1.53Ghz. Everything is ok.
just a few seconds in the flash player and death:
Click to expand...
Click to collapse
Well,as AndroHero said,Flash is quite CPU intensive.However,your problem could be caused by the fact that your CPU isn't as "good" as others.By "not good" I don't mean that your CPU's quality is bad,it's just that it is unique like every CPU(nanometer scale devices like transistors are hard to be produced and be exactly the same one with another) and it might need you to up the voltages for higher frequencies.That by itself is no problem.
If the problem is indeed your CPU's limits,as it could be app related as Flussen said,and if you are running LeeDroid's rom or at least have his kernel installed,I could provide you with the OC script I am using myself.You see,I too am "suffering" from problems with the CPU not being able to handle too high overclocks,so I had to up voltages.Fortunately not much!
catevs said:
Did someone try do downclock CPU to say 800MHz. Will it improve battery life?
Click to expand...
Click to collapse
Well,in theory it should improve battery life.But calculating battery performance is a hard and tricky process.Just think about it this way;The CPU will run at lower voltages while at its reduced max frequency,thus needing a smaller electric current.However,it will need to run at the max speed for a larger amount of time.So,what you finally get is reduced drain,but for longer periods,meaning the gains in battery life could be minimum to non-existent.I for one am running 1.8GHz and battery life is just as good as @1GHz.

[Q] Annoying loading box

Every time I use the back-key to close an app I get an annoying loading box that locks the phone for 5 to 6 seconds.
I'm running LeeDrOiD v2.2.2.
Anyone experienced the same?
Any solution?

-seagull- said:
Every time I use the back-key to close an app I get an annoying loading box that locks the phone for 5 to 6 seconds.
I'm running LeeDrOiD v2.2.2.
Anyone experienced the same?
Any solution?
Click to expand...
Click to collapse
flash CM7 that should fix it

+1
10chars

Do you under-clock your DHD? Go to SetCpu and set max freq to 1036 MHz. Or maybe you had run some process which spend your cpu time all time on 100%?

SetCPU was on performance: 1036 max - 245 min.
Now with perflock disabled I get 1804 max - 245 min running performance.
The loading box now disappears after 3 - 4 seconds but it is still there every time I use the back key.

Attached is a screenshot.

Seems that sense crashes everytime you go to your homescreen. Have you tried a full wipe yet? Should fix it IMO.
Sent from my Desire HD using Tapatalk

-seagull- said:
Attached is a screenshot.
Click to expand...
Click to collapse
How many apps do you have? Looks like android is killing sence in the background to save memory....
Sent from my Desire HD using Tapatalk

Being a gambling type of Guy, I would bet that,
A) Your using a task killer and have incorrectly set it up.
Or
B) Using "Spare Parts" you've set Activity/Process Management to Aggressive.
So how much have I won?

Hi Andy,
You are a hell of a gambling guy!
The second guess was bingo.
Thanks a million.
Wim
Sent from my Desire HD using XDA App

No problem. Glad I could help.

[Q] SetCPU won't stay at specified speed?

I specified SetCPU to have my speed at 245 min 768 max. It stays there, but then with time goes back up to 998 max. I disabled perflock, should that fix the problem?

what kernel? what ROM?
disabling perflock should fix that

i have some issues also, my evo cant take anything over 998,,it reboots but my brothers work perfect with high setup.. why could that be

elvelozpotosino said:
i have some issues also, my evo cant take anything over 998,,it reboots but my brothers work perfect with high setup.. why could that be
Click to expand...
Click to collapse
There were a few different evos made so not all of them can handle oc'ing there was hw0001 - hw0004 do to the high demand of the evo when it came out something like that.
Edit: Also even the same hw version can be different.
Sent from my PC36100 using XDA App

Stock kernel with stock rom (but removed bloatware/rooted system tweaks). Perflock disabled appeared to have fixed it. Thanks!

[Q] Setcpu Configuration?

I've recently installed setcpu and kinda fiddled around with it too much. Is there a way to go back to default setting? Do I just uninstall and reboot?
I downloaded it at first to see if it can help with some performances in games but not really sure if it can help.
Any recommended settings for playing games? And then settings for normal/easy use of the device?
I'm currently on Telus, rooted device no CWM or other ROM or Kernels (Read setcpu actually doesn't take affect until custom kernel?)
Thanks again!

I use setcpu to under clock my phone to save battery, I also have a profile set up so it uses minimal cpu while the screen is off again to save on battery. Other than that games play amazing on here haven't had any issues. I what issues are you having?
Sent from my SAMSUNG-SGH-I747 using xda premium

drock212 said:
I use setcpu to under clock my phone to save battery, I also have a profile set up so it uses minimal cpu while the screen is off again to save on battery. Other than that games play amazing on here haven't had any issues. I what issues are you having?
Sent from my SAMSUNG-SGH-I747 using xda premium
Click to expand...
Click to collapse
GTA 3 seems to be sluggish and lagging a decent amount. NOVA 3 seems to lag a bit as well, especially online it lags a crap ton (I doubt it's my wireless issue as other games seems to play fine over wifi).
Would you mind sharing one of your profiles for when the screen is off/sleep mode? I read a few threads and thought that is a great idea as some people have a profile from 12am-7am where the cpu is barely running and is near deep sleep mode of some kind.
Sorry to be bothersome but what were the default values for the cpu? I'm not sure what the ondemand and cfq mean. And do I need a custom kernel for setcpu to take affect? On the playstore someone commented that you need a custom kernel

Default is on demand cfq. The profile I have setup is for whenever I turn the screen off min 594, max 702. I've tried setting it lower but I find it makes it sluggish when I wake the phone up. As far as your games lagging I wouldn't be able to help you. Just make sure that power saver is turned off cause that defaults your cpu down to 1ghz max.
Sent from my SAMSUNG-SGH-I747 using xda premium

For the main, would it be okay to have max at 1512mhz and min at 384mhz? And would it be safe to have it max 1512mhz and min 1512mhz for games?

Yeah having your cpu running at maximum is fine, and during games having it cranked all the way up is fine too. Only thing to take into consideration is your battery.
Sent from my SAMSUNG-SGH-I747 using xda premium

drock212 said:
Yeah having your cpu running at maximum is fine, and during games having it cranked all the way up is fine too. Only thing to take into consideration is your battery.
Sent from my SAMSUNG-SGH-I747 using xda premium
Click to expand...
Click to collapse
Thanks,
Does anyone else have any thoughts to share?

My own setcpu settings are
384-1728 with Battery above 50%
384-1458 below 50%
384-1134 below 30%
384-810 below 15%
msm-dcvs scaling for all of them
Yesterday that put me at 39 hours and 20 minutes from 100% charge to 1% with pretty minimal use.

anubus45 said:
My own setcpu settings are
384-1728 with Battery above 50%
384-1458 below 50%
384-1134 below 30%
384-810 below 15%
msm-dcvs scaling for all of them
Yesterday that put me at 39 hours and 20 minutes from 100% charge to 1% with pretty minimal use.
Click to expand...
Click to collapse
Hey try a different scaling that that.
I read in a different thread that msm-dcvs was Samsungs stock scaling mode and that it was pretty good.
I tried it out and my phone lagged horribly on home screen videos and keyboard.
I since changed it and everything is running super smooth again
Just thought I'd let you know that's it's not all that's it's cracked up to be..
Sent from my SPH-L710 using xda premium

dtr145r said:
Hey try a different scaling that that.
I read in a different thread that msm-dcvs was Samsungs stock scaling mode and that it was pretty good.
I tried it out and my phone lagged horribly on home screen videos and keyboard.
I since changed it and everything is running super smooth again
Just thought I'd let you know that's it's not all that's it's cracked up to be..
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
Hmm, I tried it out out based on feedback in another thread, but I haven't had any lag personally. What would you recommend? I was using Ondemand, and it seems to be roughly the same performance-wise, though it seems like better battery life.
Currently using CM9 Nightly 7-17 with morfic's Trinity GST Alpha23 Kernel

dtr145r said:
Hey try a different scaling that that.
I read in a different thread that msm-dcvs was Samsungs stock scaling mode and that it was pretty good.
I tried it out and my phone lagged horribly on home screen videos and keyboard.
I since changed it and everything is running super smooth again
Just thought I'd let you know that's it's not all that's it's cracked up to be..
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
anubus45 said:
My own setcpu settings are
384-1728 with Battery above 50%
384-1458 below 50%
384-1134 below 30%
384-810 below 15%
msm-dcvs scaling for all of them
Yesterday that put me at 39 hours and 20 minutes from 100% charge to 1% with pretty minimal use.
Click to expand...
Click to collapse
Thats strange, on my setcpu only goes from 384mhz to 1512mhz. How'd you manage to get 1728 O_O
Also I'm not too sure if this is because I downloaded setcpu but for example say I'm on the third page from right/left of the home screen. When I press the homescreen, it doesn't fluently transition to the center screen or is this just me overthinking. I even tried uninstalling setcpu to see if that was the problem but doesn't seem like it helped. Not sure if the transition before was like this but kinda feels weird.
EDIT: If you look at the white dots below the icons, the left/right third screen from the home screen, when the home button is pressed the dot jumps to the middle, I'm sure there was a smooth transition where the dot moved through as the screen flips, but now the page just jumps

anubus45 said:
Hmm, I tried it out out based on feedback in another thread, but I haven't had any lag personally. What would you recommend? I was using Ondemand, and it seems to be roughly the same performance-wise, though it seems like better battery life.
Currently using CM9 Nightly 7-17 with morfic's Trinity GST Alpha23 Kernel
Click to expand...
Click to collapse
ive got best results with interactive scaling i do have a custom kernel that supports interactive.
Intercrew said:
Thats strange, on my setcpu only goes from 384mhz to 1512mhz. How'd you manage to get 1728 O_O
Also I'm not too sure if this is because I downloaded setcpu but for example say I'm on the third page from right/left of the home screen. When I press the homescreen, it doesn't fluently transition to the center screen or is this just me overthinking. I even tried uninstalling setcpu to see if that was the problem but doesn't seem like it helped. Not sure if the transition before was like this but kinda feels weird.
EDIT: If you look at the white dots below the icons, the left/right third screen from the home screen, when the home button is pressed the dot jumps to the middle, I'm sure there was a smooth transition where the dot moved through as the screen flips, but now the page just jumps
Click to expand...
Click to collapse
the answer there is a custom kernel as well it was over clocked to that speed.
ill post my settings here in a few minutes.

Sent from my SPH-L710 using xda premium