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[drm:gen8_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
That's interesting, I'm seeing the same errors in my OpenBSD system since they upgraded to Xorg 1.19.5; no flickering though
GonzaloP wrote:I am running Debian 9 and the VGA is VGA compatible controller: Intel Corporation HD Graphics 5500 (rev 09)
Have you tried removing xserver-xorg-video-intel?
Have you added firmware-misc-nonfree?
Use an Xorg configuration file to force the AccelMethod but I don't think that is the issue here — jessie defaulted to UXA so switching to SNA gave a significant boost, stretch defaults to SNA but the Intel DDX driver is now discouraged by Debian in favour of Xorg's builtin modesetting driver.
[336200.037408] [drm:ironlake_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
[336200.037456] [drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
Sometimes even the graphics collapses to a black screen, sometimes with some flickering pixels only at the "leftest" side. This may happen less than once a week and sometimes multiple times a day and so far I don't see a usage pattern triggering this.
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[336200.037408] [drm:ironlake_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
[336200.037456] [drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
Sometimes even the graphics collapses to a black screen, sometimes with some flickering pixels only at the "leftest" side. This may happen less than once a week and sometimes multiple times a day and so far I don't see a usage pattern triggering this.
Note that in the light of the Meltdown and Spectre, running an unpatched, older kernel will pose a major security risk. Try to disable 3D animations in GNOME instead.
[drm:gen8_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
That's interesting, I'm seeing the same errors in my OpenBSD system since they upgraded to Xorg 1.19.5; no flickering though
GonzaloP wrote:I am running Debian 9 and the VGA is VGA compatible controller: Intel Corporation HD Graphics 5500 (rev 09)
Have you tried removing xserver-xorg-video-intel?
Have you added firmware-misc-nonfree?
Use an Xorg configuration file to force the AccelMethod but I don't think that is the issue here — jessie defaulted to UXA so switching to SNA gave a significant boost, stretch defaults to SNA but the Intel DDX driver is now discouraged by Debian in favour of Xorg's builtin modesetting driver.
GonzaloP wrote: but I did not remove the xserver-xorg-video-intel. Don't I need that driver to run X?
No, you don't if you use Intel iGPU from 2008. onwards. Newer cards will use modesetting (i915 kernel driver). I don't think firmware package will help, honestly.
Wheelerof4te wrote:There isn't a solution. Only option is to use another kernel that doesn't have that problem. Or wait with an outdated, insecure kernel for Debian 9.4.
I am experiencing the same problem on a similar configuration (4.9.0-4-amd64 #1 SMP Debian 4.9.65-3+deb9u1 et Gnome 3.22 ).
Wheelerof4te wrote:There isn't a solution. Only option is to use another kernel that doesn't have that problem. Or wait with an outdated, insecure kernel for Debian 9.4.
Does anyone have the reference of kernel that I may install to solve the problem ?