For further info see https://bugzilla.redhat.com/show_bug.cgi?id=1398362 When booting 4.9.3 kernel , gdm starts with a black/gray screen. Some bisecting gave the results below. I found that 4.9.3 kernel (from linux-stable) after reverting commit 0ce140d45a8398b501934ac289aef0eb7f47c596, the problem is fixed. Relevant output from the logs (4.9.3-1-g17a6527 is the one with the reverted patch): Command line: BOOT_IMAGE=/vmlinuz-4.9.3-1-g17a6527+ root=/dev/mapper/vg0-root ro rd.auto=1 Command line: BOOT_IMAGE=/vmlinuz-4.9.3 root=/dev/mapper/vg0-root ro rd.auto=1 [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
(In reply to Anders Blomdell from comment #0) > I found that 4.9.3 kernel (from linux-stable) after reverting commit > 0ce140d45a8398b501934ac289aef0eb7f47c596, the problem is fixed. Relevant > output from the logs (4.9.3-1-g17a6527 is the one with the reverted patch): The bad commit is commit 0ce140d45a8398b501934ac289aef0eb7f47c596 Author: Ville Syrjälä <ville.syrjala@linux.intel.com> Date: Tue Oct 11 20:52:47 2016 +0300 drm/i915: Clean up DDI DDC/AUX CH sanitation
Please attach full dmesg with drm.debug=0xe for both the good and bad kernels. Also a copy of /sys/kernel/debug/dri/0/i915_opregion would be nice.
Hi, any comments from reporter, we are closing if no feedback received in a month.
Created attachment 131331 [details] dmesg of failed graphics
Created attachment 131332 [details] dmesg of successful graphics
Created attachment 131333 [details] opregion of failed graphics
Created attachment 131334 [details] opregion of successful graphics
Failed version is 4.8.15 Successful version is 4.9.10
I suspect this has been fixed by commit bb1d132935c2 ("drm/i915/vbt: split out defaults that are set when there is no VBT") Can you confirm?
(In reply to Ville Syrjala from comment #9) > I suspect this has been fixed by commit bb1d132935c2 ("drm/i915/vbt: split > out defaults that are set when there is no VBT") > > Can you confirm? Which git-repo?
(In reply to Anders Blomdell from comment #10) > (In reply to Ville Syrjala from comment #9) > > I suspect this has been fixed by commit bb1d132935c2 ("drm/i915/vbt: split > > out defaults that are set when there is no VBT") > > > > Can you confirm? > > Which git-repo? It should be in Linus's tree by now.
Reporter, ca you report back?
commit bb1d132935c2 works! Thanks!
confirmed as resolved... need to test again once patch is incorporated
Closing since code is on drm-tip. commit bb1d132935c2f87cd261eb559759fe49d5e5dc43 Author: Jani Nikula <jani.nikula@intel.com> AuthorDate: Fri Mar 10 15:27:58 2017 +0200 Commit: Jani Nikula <jani.nikula@intel.com> CommitDate: Tue Mar 14 10:49:13 2017 +0200 drm/i915/vbt: split out defaults that are set when there is no VBT AND commit 9301397a63b3bf1090dffe846c6f1c8efa032236 Author: Manasi Navare <manasi.d.navare@intel.com> AuthorDate: Thu Apr 6 16:44:19 2017 +0300 Commit: Jani Nikula <jani.nikula@intel.com> CommitDate: Thu Apr 13 21:57:37 2017 +0300 drm/i915: Implement Link Rate fallback on Link training failure
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.