Known Issues with CyanogenMod for the Samsung Galaxy S II ("i9100")

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This page lists known issues with CyanogenMod for the Galaxy S II. It can be updated by users and maintainers, but please obey the guidelines! Help keep this page clean; if a report violates the guidelines, delete it.

Note: Guidelines for posting a known issue

  1. For CyanogenMod 11 and newer, you must accompany a reported issue with a link to the JIRA bug report. Issues that are not linked to a proper bug report will be deleted.
  2. For older branches of CyanogenMod, JIRA bug reports are not necessary; but, be sure an issue is reproducible by others and after a clean install of CyanogenMod.
  3. Please describe issues clearly when adding them to this page.

Example: *The camera does not focus ([ CYAN-0000])

CyanogenMod 12.1

  • Can't turn on screen when dialing (CYAN-7055)

CyanogenMod 11

  • YouTube videos are pixelated (CYAN-4328, see the bug report for a workaround).
  • When using certain file systems (e.g. FAT32), problems appear with accessing the SD card (both internal and external). Symptoms include music playback randomly stopping after some time or errors when copying large amounts of files (e.g. backups). As a workaround, the (internal and/or external) SD card can be formatted with exFAT. (CYAN-3877) Note: The problem is fixed since cm-11-20150111-NIGHTLY.

CyanogenMod 10.2

  • Routing audio through a dock isn't supported
  • TV-Out is non-functional
  • Apps "DailyRoads Voyager" or "AutoGuard" (require filming) crash and disable camera. Requires reboot to re-enable camera.
  • From nightlies dated 20140105 or later, the SC-02C (Japan NTT Docomo) model is supported via asserts. Flash wjchen0's GPS fix to fix GNSS direction inversion on this variant.
  • Sound Lags While Streaming Videos

CyanogenMod 10.1

  • Routing audio through a dock isn't supported
  • TV-Out is non-functional
  • Screen auto rotate doesn't work sometimes. Not all phones seem to be affected.
  • 3G internet connection tethering through USB cable doesn't work (workaround: use JB WiFi Tether)
  • The Camera tile from the Quick Settings panel is unable to start the camera application.
  • From time to time, the phone uses the default ringtone instead of the one associated with the contact making the call.
  • Occasionally, the Google Play app displays an error message Authentication is required. You need to sign into your Google Account. and a reboot is required to fix it.
  • Automatic Brightness is not working (no adjustments whatsoever), although the data read from the light sensor in different light conditions varies (verified in Androsens).
  • Sound Lags While Streaming Videos