Develop Bugs

Black screen , trouble with sd-card and ROM's ..

Hi there ..
I'm a new to this site , and this is quietly the 1st question I would ask ..
simply , when I connect my sd card , the mobile runs normally , but after a while It turst to black screen " without calls through , not promixory issue "
I tried and searched alot to find a solution for this problem ..
since I was on the official rom , I updated and same ..
I moved to MIUI rom " version 2.1.13 " and it fixed everything ..
idk but since that time , my mobile was able to deal with highier space of memory specially with gallary , while It was ALWAYS AND ALWAYS Freezing whenever i enter there with only 300 photos , on MIUI It's OK with up to 1000 photos !
I moved to another MIUI rom based on ICS and It seems to be heavy and freezing a lot ..
now I moved to another ICS rom , that's based on the main ICS rom with tweaks ..
but I now get the black screen again ..
I'm goin' to format my sd card , but It is goin' to happen again ..
anyone have any idea what's goin' on with this problem .. ?
and if It's a hardware problem , then why does it disappear when I move to MIUI ROMs ?
" NOT tryin' to make an advertise of any ROM's , but to keep everything on the line and to explain the problem .. "
thx for readin' ..
pls reply if yo got any Idea
My sd card : 8GB class 4
Using a normal SE xperia ARC
thx ...

Fixed ! Solution ..
well , while I was loopin' around I found the solution which was a reply of someone ..
the problem was that the phone won't wake up after the screen locks ..
and the reason was of the CPU frequencies ..
Even in the main official ROM , the minimum frequency was too low ..
and it was causing this problem , even in Some Miui Roms ..
Sharing the solution , hope it helps someone out there ..

information required

Hey frnds,
I have two dbts.;
1.It has 512MB ram.But task manager total is only 366MB.
ie.,Total(366MB)=used(139MB)+free(227MB). even though i am not running any app, it showing 139MB used ???and where is the remaining 146MB??
2.It has 4GB internal memory.I am accessible only 0.94GB.Where is the remaining 3.06GB ??

1st question - it has nly 350 mb ram that means only that much is available for apps and other is required for Android os
2nd- same thing 1gb is available for apps installation and other remaining space is for the rom
if u wld have taken a little trouble u might have found ur answer urslf many threads+ post regarding this
Sent from my HTC One V

refer to this thread
thanks
http://forum.xda-developers.com/showthread.php?p=29818791#post29818791

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Thanks and sorry my English is very bad.

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I recently rooted my sony xperia m dual build number 15.2.A.2.5 and installed Link2SD and Folder Mount.
when I reboot my device it takes about 6 minutes to startup which is pretty slow
Can you please help ??

I Don't understand
Many have seen my post but no replies ??
Is it normal to have slow startup or not ???
Am I in trouble or this is normal for everyone ??
PLEASE HELP

I've got link2sd and FM and I've a normal startup.
Only the first start was aprox. 6 min.
Maybe link2sd find the ext partition not in time.

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