2e43720 + my submitted patch to tweak the pageflip messages. After attaching gdb I see that drmModeSetCrtc doesn't called on this new output before the page flip gets called. [13:58:30.765] Output HDMI1, (connector 16, crtc 5) mode 1920x1080@60.0, preferred, current mode 1920x1080@50.0 mode 1920x1080@30.0 mode 1920x1080@25.0 mode 1920x1080@24.0 mode 1920x1080@50.0 mode 1920x1080@60.0 mode 1600x1200@60.0 mode 1680x1050@59.9 mode 1680x945@60.0 mode 1400x1050@59.9 mode 1600x900@60.0 mode 1280x1024@75.0 mode 1280x1024@60.0 mode 1440x900@75.0 mode 1440x900@59.9 mode 1280x960@60.0 mode 1366x768@60.0 mode 1360x768@60.0 mode 1280x800@74.9 mode 1280x800@59.9 mode 1152x864@75.0 mode 1280x768@74.9 mode 1280x768@60.0 mode 1280x720@50.0 mode 1280x720@60.0 mode 1024x768@75.1 mode 1024x768@70.1 mode 1024x768@60.0 mode 1024x576@60.0 mode 832x624@74.6 mode 800x600@72.2 mode 800x600@75.0 mode 800x600@60.3 mode 800x600@56.2 mode 720x576@50.0 mode 848x480@60.0 mode 720x480@59.9 mode 640x480@72.8 mode 640x480@75.0 mode 640x480@66.7 mode 640x480@60.0 mode 720x400@70.1 [13:58:30.767] connector 16 connected [13:58:30.817] queueing pageflip failed (start repaint loop): Device or resource busy
And like https://bugs.freedesktop.org/show_bug.cgi?id=63812 i've tracked this down to: commit e5a1225bc436f86b5241152bb332014d64f5b446 Author: Jonas Ådahl <jadahl@gmail.com> Date: Fri Apr 5 23:07:11 2013 +0200 Make backends always specify output repaint time
commit 95eb3a2eb470bd341ab078c7e48a28ffebc6dde1 Author: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> Date: Tue May 7 14:16:59 2013 +0300 compositor-drm: Don't page flip before a mode is set The function drm_output_start_repaint_loop() unconditionally issues a page flip, even if the crtc for that output has not been enabled yet. That causes the page flip to fail, and drm_output_repaint() is never called. Solve this by bypassing the initial page flip if the output needs a mode set. This has the caveat of affecting latency predictability for that first frame and when a "driver" mode fullscreen surface causes a mode set. However, on both cases the mode set would take an unpredictable amount of time anyway. https://bugs.freedesktop.org/show_bug.cgi?id=63812 https://bugs.freedesktop.org/show_bug.cgi?id=64183
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