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[Launchpad Bug Tracker <1345533@xxxxxxxxxxxxxxxxxx>]

** Branch linked: lp:ubuntu/utopic-proposed/mir

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https://bugs.launchpad.net/bugs/1345533

Title:
  [regression][hammerhead] Mir fails to start on Nexus 5 & 10 as it
  fails to turn vsync signal on

Status in Mir:
  Fix Committed
Status in Mir 0.5 series:
  Fix Committed
Status in “mir” package in Ubuntu:
  In Progress

Bug description:
  Starting from image 137, with mir 0.5, Mir fails to start on Nexus 5
  (hammerhead), as it fails to turn the vsync signal on.

  This is what I get from logcat:

  D/libEGL  ( 3038): loaded /vendor/lib/egl/libEGL_adreno.so
  D/libEGL  ( 3038): loaded /vendor/lib/egl/libGLESv1_CM_adreno.so
  D/libEGL  ( 3038): loaded /vendor/lib/egl/libGLESv2_adreno.so
  I/qdutils ( 3038): Right Split=0
  D/qdhwcomposer( 3038): int qhwc::adRead(): /sys/class/graphics/fb2/ad could not be opened : No such file or directory
  I/qdhwcomposer( 3038): Initializing Qualcomm Hardware Composer
  I/qdhwcomposer( 3038): MDP version: 500
  I/Adreno-EGL( 3038): <qeglDrvAPI_eglInitialize:320>: EGL 1.4 QUALCOMM Build: I0404c4692afb8623f95c43aeb6d5e13ed4b30ddbDate: 11/06/13
  D/qdhwcomposer( 3038): hwc_getDisplayAttributes disp = 0, width = 1080
  D/qdhwcomposer( 3038): hwc_getDisplayAttributes disp = 0, height = 1920
  I/Adreno-EGL( 3038): <qeglDrvAPI_eglInitialize:320>: EGL 1.4 QUALCOMM Build: I0404c4692afb8623f95c43aeb6d5e13ed4b30ddbDate: 11/06/13
  I/qdhwcomposer( 3038): hwc_registerProcs
  I/qdhwcomposer( 3038): Initializing UEVENT Thread
  I/qdhwcomposer( 3038): Initializing VSYNC Thread
  I/qdhwcomposer( 3038): vsync_loop: Reading vsync for dpy=0 from /sys/class/graphics/fb0/vsync_event
  I/qdhwcomposer( 3038): vsync_loop: Reading vsync for dpy=1 from /sys/class/graphics/fb1/vsync_event
  D/qdhwcomposer( 3038): hwc_blank: Unblanking display: 0
  D/qdhwcomposer( 3038): hwc_blank: Done unblanking display: 0
  E/qdhwcomposer( 3038): hwc_vsync_control: vsync control failed. Dpy=0, enable=1 : Operation not supported
  W/libEGL  ( 3038): eglTerminate() called w/ 1 objects remaining
  E/libEGL  ( 3038): validate_display:263 error 3001 (EGL_NOT_INITIALIZED)
  I/ServiceManager(  913): service 'display.qservice' died

  The vsync control failed message was always there, and Mir 0.4 worked
  fine with it still.

  System compositor log:
  root@ubuntu-phablet:/var/log/lightdm# cat unity-system-compositor.log
  ERROR: /build/buildd/mir-0.5.0+14.10.20140717/src/platform/graphics/android/real_hwc_wrapper.cpp(75): Throw in function virtual void mir::graphics::android::RealHwcWrapper::vsync_signal_on() const
  Dynamic exception type: N5boost16exception_detail10clone_implINS0_19error_info_injectorISt13runtime_errorEEEE
  std::exception::what: error turning vsync signal on. rc = ffffffa1

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