As reported in multiple places on the forum, stock ICS ROMs do not come with the CRT-Off effect available, although the code is there and lots of existing mods already exist to be able to turn it on.
The implementation, however, contains a glitch and every once in a while the full screen image will blink right after the beam collapses.
I have managed to apply the fix to the Sammy's custom library that implements this, even though the source code is not available. (this wouldn't be possible without the good folks on CM9, though!).
The discussion that lead to this work can be found here, on the awesome JKay mod. BTW, if this fix is useful to you, do me a favor a buy that man's Deluxe app (it's really a favor you're doing to yourself, not me
).
via
For any ROM cookers, MOD developers, or end-users, I leave the patched file and a few instructions to make sure the provided lib only changes the flicker part. This is because I have performed the changes on the file shipped on XWLP9, and if other different files exist in other builds, it's more convenient to apply the fix there instead of using the lib from a different ROM and possibly lose some other improvements or fixes applied by Samsung.
Please check the Readme file in the archive for instructions on what to confirm and how to apply the change, and let me know if there's any question or if you have a different base version.
EDIT:
The library has been updated to handle CRT-On effect as well. You can safely replace it with the attached version, although you'll need to have a mod to activate the CRT-On effect as well.
If you want to install a standalone patch to activate this, have a look at this post and follow the instructions.
Technical notes
The code has been revised to display 8 frames when turning on - as opposed to 24 when turning off - in order to have a faster response. This is however still dependent on the time taken by the kernel to wake the CPU, before drawing can begin (currently about 1s). This delay will not happen if you don't wait long enough after turning off, as the CPU will not enter deep sleep.
Changes from Kamma have also been applied, in order to have a similar effect when turning On - "normal" screen colors instead of random color spikes. This might be barely noticeable due to the animation speed.
Known issue: if the screen is turned off when watching a video on the Youtube app, when turning back on with the effect enabled this will freeze the screen and originate a reboot after a few seconds. Still pending to know if it also happens with CM9 on SGS2.
The implementation, however, contains a glitch and every once in a while the full screen image will blink right after the beam collapses.
I have managed to apply the fix to the Sammy's custom library that implements this, even though the source code is not available. (this wouldn't be possible without the good folks on CM9, though!).
The discussion that lead to this work can be found here, on the awesome JKay mod. BTW, if this fix is useful to you, do me a favor a buy that man's Deluxe app (it's really a favor you're doing to yourself, not me
).via
For any ROM cookers, MOD developers, or end-users, I leave the patched file and a few instructions to make sure the provided lib only changes the flicker part. This is because I have performed the changes on the file shipped on XWLP9, and if other different files exist in other builds, it's more convenient to apply the fix there instead of using the lib from a different ROM and possibly lose some other improvements or fixes applied by Samsung.
Please check the Readme file in the archive for instructions on what to confirm and how to apply the change, and let me know if there's any question or if you have a different base version.
EDIT:
The library has been updated to handle CRT-On effect as well. You can safely replace it with the attached version, although you'll need to have a mod to activate the CRT-On effect as well.
If you want to install a standalone patch to activate this, have a look at this post and follow the instructions.
Technical notes
The code has been revised to display 8 frames when turning on - as opposed to 24 when turning off - in order to have a faster response. This is however still dependent on the time taken by the kernel to wake the CPU, before drawing can begin (currently about 1s). This delay will not happen if you don't wait long enough after turning off, as the CPU will not enter deep sleep.
Changes from Kamma have also been applied, in order to have a similar effect when turning On - "normal" screen colors instead of random color spikes. This might be barely noticeable due to the animation speed.
Known issue: if the screen is turned off when watching a video on the Youtube app, when turning back on with the effect enabled this will freeze the screen and originate a reboot after a few seconds. Still pending to know if it also happens with CM9 on SGS2.
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