Ubuntu
linux package

  1. Bug #1420290
  2. Comment #16

Comment 16 for bug 1420290

Revision history for this message
Sander Jonkers (jonkers) wrote :

drm.debug=0xe added kernel command line:

$ dmesg | head
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 3.19.0-16-generic (buildd@komainu) (gcc version 4.9.2 (Ubuntu 4.9.2-10ubuntu13) ) #16-Ubuntu SMP Thu Apr 30 16:09:58 UTC 2015 (Ubuntu 3.19.0-16.16-generic 3.19.3)
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.19.0-16-generic root=UUID=07d60846-8d52-4911-b233-7e5b8611e217 ro quiet splash drm.debug=0xe vt.handoff=7
[ 0.000000] KERNEL supported cpus:
[ 0.000000] Intel GenuineIntel
[ 0.000000] AMD AuthenticAMD
[ 0.000000] Centaur CentaurHauls
[ 0.000000] e820: BIOS-provided physical RAM map:

dmesg is now showing a lot of "[drm:..." lines:

[ 9.002449] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
[ 9.002453] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
[ 9.002456] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:30:HDMI-A-1] disconnected
[ 9.002459] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:35:DP-1]

I'll report as soon as the flip error occurs again

(I hope this post will also appear on bugs.freedesktop.org)