[LG Optimus 2x] echo_21:
This Known Issues List

should prevent one-liner finding reports related to already known issues

should keep later disappointment from end-users of tonyp's theROM and clean CM 10.2

defines an everlasting unique identifier for each known issue. Use the identifier for simplified unambiguous communication. Please write e.g. "issue #2" if you want to refer to the silent blue-tooth call bug

should show possible workarounds, or, even better, should motivate discussions to fix the issue.

should neither let you imply that the issue will be fixed soon, nor that it is fixable at all! It is technically really hard to analyze, find and fix the root cause. Please never ask for an ETA! The community is aware of, and is of cause already unhappy (see e.g. this post) about these known issues.

will not cover issues that exist in only 1 or 2 intermediate builds of theROM and that are already fixed in the latest build. Please also consult change log by [MENTION=2666848]tr@p[/MENTION]

Known Issues List as of 2013/12/28 (theROM build 22-26 resp. clean CM10.2 incl. 2013-12-13):

HDMI doesn't work

Workaround: use stock LG GB ROM (I don't know whether stock LG ICS works)

Calls from BT headset connect but are silent for caller and callee

Workaround: use e.g. CM10.1 T-builds or ParanoidAndroid (PA) ROM

Root cause: not yet found; speculation: volume gain factor is set to 0 somewhere

Discussion: see e.g. post3, post2 , post1 issue b)

Mobile data counting doesn't work (blue arrows on mobile data indicator don't appear; e.g. Avast shows error message)

Workaround: use e.g. CM10.1 T-builds or ParanoidAndroid (PA) ROM

Root cause: bug in Android 4.3 (inherited to CM10.2)!?

Discussion: see e.g. note 3 in post3, post2, post1, report to Google

Stock camera

takes heavily over-exposed pics with flash

Workaround: tap the screen first before you click the camera fire button; this will correct exposure parameters

crashes often, or produces crashes of Trebuchet and gallery

Workaround 1: use e.g. cam app ported for CM10.1 by feav; it provides also features like panorama pix missing in the stock cam

Workaround 2 (not fully proven): flash the gallery.apk from build 23; some say the stock cam works without crashes then

BT media playback speeds up after minutes to hours.

Fix: at least fixed in build 22 (I dont't remember the exact build)

Some apps (e.g. Candy Crush) crash with the KK in the RAM hack version

Workaround: flash the no RAM hack (norh) version of Kowalski kernel (KK) by Pengus77

Slow GPS fix. Cause: missing file \data\gps\lto.dat that is up to date too.

Fix: seems to be fixed in build 23; some issues with the fix have been reported; under investigation

Literature: xda forum thread2, [URL="http://xdaforums.com/showthread.php?p=15271402#post15271402"]thread1[/URL]

Long lags after heavy filling and emptying the flash memory. Reboot does not help

Workaround: backup data partition, wipe it, and restore the backup

Root cause: kernel does not implement TRIM functionality that makes use of the SD/MMC ERASE (CMD38) command.

References: wikipedia TRIM, wikipedia TRIM#SD/MMC

Discussion: post4, post3, post2, post1

Mobile data mode keeps being disabled when switching airplane mode off

Workaround: either disable and re-enable data or toggle 2g/3g twice. In some rare cases these workarounds won't work and a reboot is needed

Root cause: yet unknown

Current time shown is that for GMT time zone instead of for your local timezone. Time shift is always in full hours.

Workaround 1: Reboot; normally this restores correct time display.

Workaround 2: Disable automatic time sync and install a time sync app

Workaround 3: If you'd like to keep using automatic time you should add "telephony.test.ignore.nitz=true" to your build.prop

Root cause: yet unknown

Discussion: post2, topic #3 in post1

Some apps always crash under theROM and they also don't work on stock ICS on P990. Some of such seem to be Viber, Instagram, etc.

Request: please report as soon as the app started working correction on a new theROM build.

Recommendation 1: Search in this thread if your app is known to be incompatible with theROM

Recommendation 2: Search the internet if your app is known to be incompatible with stock ICS on P990

Recommendation 3: Try your app on P990 under stock ICS

Rule: never post problems with your app in this thread if its incompatibility to theROM or ICS on P990 is already known!

Recommendation 4: Ask the author of your app for help

Workaround: Use your app on P990 under stock ICS, or on another phone. (sorry for bad news!)

Root cause: potentially missing NEON support by P990; many others possible

no FM radio

note: theROM builds from version 27 ship Kowalski Kernel 3.1 (instead of KK 2.6 M1). As this might solve old known issues and might bring new ones I decided to archive and hide the above list for builds up to version 26. The below list for build version from 27 starts as a 1:1 copy of the above. As I am not on build 27 yet, I am not able to bring in my own experience. Additionally I don't have the time to read and evaluate all posts regarding build 27+. Please notify me for necessary corrections and additions of the below list.

Known Issues List as of 2013/12/28 (theROM build from 27):

HDMI doesn't work

Workaround: use stock LG GB ROM (I don't know whether stock LG ICS works)

Calls from BT headset connect but are silent for caller and callee

Workaround: use e.g. CM10.1 T-builds or ParanoidAndroid (PA) ROM

Root cause: not yet found; speculation: volume gain factor is set to 0 somewhere

Discussion: see e.g. post3, post2 , post1 issue b)

Mobile data counting doesn't work (blue arrows on mobile data indicator don't appear; e.g. Avast shows error message)

Workaround: use e.g. CM10.1 T-builds or ParanoidAndroid (PA) ROM

Root cause: bug in Android 4.3 (inherited to CM10.2)!?

Discussion: see e.g. note 3 in post3, post2, post1, report to Google

Stock camera

takes heavily over-exposed pics with flash

Workaround: tap the screen first before you click the camera fire button; this will correct exposure parameters

crashes often, or produces crashes of Trebuchet and gallery

Workaround 1: use e.g. cam app ported for CM10.1 by feav; it provides also features like panorama pix missing in the stock cam

Workaround 2 (not fully proven): flash the gallery.apk from build 23; some say the stock cam works without crashes then

BT media playback speeds up after minutes to hours.

Fix: at least fixed in build 22 (I dont't remember the exact build)

Some apps (e.g. Candy Crush) crash with the KK in the RAM hack version

Workaround: flash the no RAM hack (norh) version of Kowalski kernel (KK) by Pengus77

Slow GPS fix. Cause: missing file \data\gps\lto.dat that is up to date too.

Fix: seems to be fixed in build 23; some issues with the fix have been reported; under investigation

Literature: xda forum thread2, [URL="http://xdaforums.com/showthread.php?p=15271402#post15271402"]thread1[/URL]

Long lags after heavy filling and emptying the flash memory. Reboot does not help

Workaround: backup data partition, wipe it, and restore the backup

Root cause: kernel does not implement TRIM functionality that makes use of the SD/MMC ERASE (CMD38) command.

References: wikipedia TRIM, wikipedia TRIM#SD/MMC

Discussion: post4, post3, post2, post1

Mobile data mode keeps being disabled when switching airplane mode off

Workaround: either disable and re-enable data or toggle 2g/3g twice. In some rare cases these workarounds won't work and a reboot is needed

Root cause: yet unknown

Current time shown is that for GMT time zone instead of for your local timezone. Time shift is always in full hours.

Workaround 1: Reboot; normally this restores correct time display.

Workaround 2: Disable automatic time sync and install a time sync app

Workaround 3: If you'd like to keep using automatic time you should add "telephony.test.ignore.nitz=true" to your build.prop

Root cause: yet unknown

Discussion: post2, topic #3 in post1

Some apps always crash under theROM and they also don't work on stock ICS on P990. Some of such seem to be Viber, Instagram, etc.

Request: please report as soon as the app started working correction on a new theROM build.

Recommendation 1: Search in this thread if your app is known to be incompatible with theROM

Recommendation 2: Search the internet if your app is known to be incompatible with stock ICS on P990

Recommendation 3: Try your app on P990 under stock ICS

Rule: never post problems with your app in this thread if its incompatibility to theROM or ICS on P990 is already known!

Recommendation 4: Ask the author of your app for help

Workaround: Use your app on P990 under stock ICS, or on another phone. (sorry for bad news!)

Root cause: potentially missing NEON support by P990; many others possible

no FM radio

Consider not flashing theROM in case you can't live with one or more of the listed open issues.

Please report any ideas, how to further analyze or fix the issue. Or please provide better workarounds.

The above list is to my best knowledge. I can neither guarantee it is correct nor it is complete. Please help to improve it.

Every bug is an issue. But there might be issues not caused by bugs (= errors in source code).