After upgrading from 4.9.61 there's an intermittent flicker when entering the first character in a terminal, editor, input-box or even randomly without any action from my side. dmesg shows: ... [drm:ironlake_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun [drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun [drm:ironlake_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun [drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder B FIFO underrun ... CPU: Intel Core i3 Can't bisect this at the moment but I've seen this before: https://bugs.freedesktop.org/show_bug.cgi?id=97283 A bad i915-related backport, I think.
Yes, it's the i915-backports that cause the problem: - diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 49de476..277a802 100644 - diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index a19ec06..3ce9ba3 100644 After reversing *both* (else the kernel won't compile) the flicker is gone, no more messages in dmesg. 4.4 is also unusable with those processors b/c of i915-problems (https://bugs.freedesktop.org/show_bug.cgi?id=99737). And I have a premonition now concerning 4.14. ;)
As this matter seems specific to LTS-kernel 4.9, I had also reported this at kernel.org. We're working on a solution there. So, AFAIC you may close this report. BTW: 4.14 is not affected. So long! Rainer Fiebig
(In reply to Rainer Fiebig from comment #2) > As this matter seems specific to LTS-kernel 4.9, I had also reported this at > kernel.org. We're working on a solution there. > > So, AFAIC you may close this report. > > BTW: 4.14 is not affected. > > So long! > Rainer Fiebig Thanks for the information Rainer, closing then. Do you mind sharing the link of the bug at kernel.org in case someone looks for the issue here. Thank you again.
bugzilla-daemon@freedesktop.org wrote: > Elizabeth <mailto:elizabethx.de.la.torre.mena@intel.com> changed bug > 103796 <https://bugs.freedesktop.org/show_bug.cgi?id=103796> > What Removed Added > Status NEW RESOLVED > Resolution --- NOTOURBUG > > *Comment # 3 <https://bugs.freedesktop.org/show_bug.cgi?id=103796#c3> on > bug 103796 <https://bugs.freedesktop.org/show_bug.cgi?id=103796> from > Elizabeth <mailto:elizabethx.de.la.torre.mena@intel.com> * > > (In reply to Rainer Fiebig from comment #2 <show_bug.cgi?id=103796#c2>) >> As this matter seems specific to LTS-kernel 4.9, I had also reported this at > kernel.org. We're working on a solution there. > > So, AFAIC you may > close this report. > > BTW: 4.14 is not affected. > > So long! > Rainer > Fiebig > Thanks for the information Rainer, closing then. Do you mind sharing the link > of the bug at kernel.org in case someone looks for the issue here. Thank you > again. > > ------------------------------------------------------------------------ > You are receiving this mail because: > > * You reported the bug. > It's an email-thread at stable@vger.kernel.org, look for same re: Cheers!
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