Good friend Pete Kambasis sent me his old Galaxy Note i717 for me to fiddle with. If I can get better performance out of it than my Galaxy Note SC-05D (the Japanese model), then I may switch over to it as my primary phone.
The problem is that my Japanese phone has hardware that’s unique in the world of Galaxy Note phones, so there aren’t a lot of good custom ROMs for it. The i717 was widely used in North America, and therefore has a lot of choices.
I’ve chosen LiquidSmooth 3.1 as it promised good speed. One of the problems with it (that I supposedly fixed with a patch) is a screen flickering issue that occasionally renders the phone well-nigh unusable.
This is caused by the GPU and CPU essentially “fighting” over which of them is rendering the screen, apparently. A potential cause is a conflicting line in the /system/build.prop file. Here’s the fix I found and I tried:
In the build.prop file under "# Screen flicker fixes" [there is] this line – "persist.hwc.mdpcomp.enable=false" and then under additional build properties [there is] this line – "persist.hwc.mdpcomp.enable=true". I removed the conflicting "persist.hwc.mdpcomp.enable=true" under additional build properties and rebooted.
Use a root enabled file explorer. I use Root Explorer. Navigate to Root/System/ there you will find a file "Build.prop". Mount system as RW (read-write, on Root Explorer this is an option at the top of the file list. Change from RO, read only, to RW) Long press the Build.prop file and select open in text editor. Now you will be able to edit the file. Careful here, you don’t want to change anything you’re unsure of. Scroll down towards the bottom of the text and you will find the aforementioned duplication under "Additional build properties". Just delete the duplicated line then select save and exit. If you think you made a mistake, just close without saving and start over.
(This from user rsfinsrq at XDA developers. http://forum.xda-developers.com/showpost.php?p=54541112&postcount=386 )
Now I just need to solve the “move app to SD” problem…