Finally, the simple solution to fix touchpads and O button problems for Xperia Play just revealed through xda forum. The problems happen when you flash your Xperia Play with a custom ROM like CyanogenMod 9 or 9.1, you will find malfunction of touchpads and the O button because the ROM identify Xperia Play incorrectly in the build.prop of CyanogenMod 9.0 or 9.1 or any custom ROM for Xperia Play. So, what you need is just modify the build.prop to correct the several line to match with Xperia Play. The build.prop of CM 9.0/9.1 must identify the device to be “R800i”, [...]