** Package changed: libdrm (Ubuntu) => xserver-xorg-video-intel (Ubuntu)
** Changed in: xserver-xorg-video-intel (Ubuntu)
Importance: Critical => High
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Finally got the dump just as the monitor started to flicker.
** Attachment added: "crash-kdump.tar.gz"
https://bugs.launchpad.net/ubuntu/+source/libdrm/+bug/1522922/+attachment/4553076/+files/crash-kdump.tar.gz
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** Changed in: libdrm (Ubuntu)
Status: Confirmed => Triaged
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https://bugs.launchpad.net/bugs/1522922
Title:
Screen flickering in Intel i915 driver
(In reply to Tom Furniss from comment #69)
> Created attachment 120919 [details]
> syslog for 3 patches with increased debug
>
> Hi Mika
>
> No problem. I applied the following patches to the latest drm-intel-nightly:
> https://patchwork.freedesktop.org/patch/69394/
>
Created attachment 120919
syslog for 3 patches with increased debug
Hi Mika
No problem. I applied the following patches to the latest drm-intel-nightly:
https://patchwork.freedesktop.org/patch/69394/
https://patchwork.freedesktop.org/patch/69395/
https://patchwork.freedesktop.org/patch/69396/
Created attachment 120920
dmesg for 3 patches with increased debug
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Title:
Screen flickering in Intel i915 driver
Created attachment 120893
DP debugging
Tom, I would bother you again to provide some debugging info. From the
dmesg you sent it seems that you are experiencing a lot of hpd
interrupts. When that happens the driver checks if the DP channel
equalization is still ok. On your case, channel
(In reply to Rodrigo Vivi from comment #65)
> Seeing the video again and based on recent issues I faced I believe this
> could be watermark related...
> So, could you please apply http://patchwork.freedesktop.org/patch/69417/
> and boot with i915.enable_watermark=0 and let us know what happens?
Seeing the video again and based on recent issues I faced I believe this could
be watermark related...
So, could you please apply http://patchwork.freedesktop.org/patch/69417/
and boot with i915.enable_watermark=0 and let us know what happens?
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Thank you Tom for the syslog. From the log the DP link training is
completed but for some reason the DP channel equalization fails. At this
point we request to do link training once again and now first we try
first the drive current and pre-emphasis levels from the previous link
training. Instead
Created attachment 120819
dmesg after three patches and returned flicker
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Title:
Screen flickering in Intel i915
> think Mika is on the right track, having solved the initial problem
> (persistent flickering) by modifying the eDP link training. The remaining
> problem is that the flickering recurs when the display resumes from sleep.
in my case flickering occur just after reboot (and this is not the same
Created attachment 120818
syslog after three patches and returned flicker
Hi Mika.
I seem to have regressed, and the flicker has returned. I took a new
branch of intel-drm-nightly, and applied the three patches in the
sequence you provided, but the flickering has returned and is consistent
on
> https://patchwork.freedesktop.org/patch/69394/
> https://patchwork.freedesktop.org/patch/69395/
> https://patchwork.freedesktop.org/patch/69396/
>
> flux242 seems to have a clock recovery issue. This fix may provide a
> solution for that as well.
three patches above (without the
Created attachment 120678
syslog for sleep/resume flickering issue
Mika - this is the syslog for the flickering on resume from sleep, after
applying your latest patch
(https://bugs.freedesktop.org/attachment.cgi?id=120493)
I do fairly consistently see a single flicker after requesting sleep,
and
patch https://patchwork.freedesktop.org/patch/66697/ DOESN'T solve the
flickering problem on my computer.
What I did:
1. installed generic kernel and headers from
http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/2015-12-24-wily/
2. get the sources from the
(In reply to Andrew Merzlyakov from comment #52)
> I've experienced exactly the same problem, as Tom Furniss described.
> Kernel version: 4.2.6-301.fc23.x86_64
> dmesg with drm.debug=14 attached.
> I'm failed to apply patches, files structure in drivers/gpu/drm/i915/ is
> slightly different.
> If
Created attachment 120493
Disable fast link training when resuming
Tom - thank you for you feedback and logs. I think I need to disable the
fast link training feature when resuming from the suspend state. This
patch does just that in case of DP or eDP connectors. Please, test this
patch if this
(In reply to Mika Kahola from comment #54)
> These patches apply to drm-intel-nightly kernel which is a development tree
> for i915 driver. You can clone the git repository from
>
> https://01.org/linuxgraphics/documentation/development/source-code
>
> and apply these patches on top of it. I'm
> Cloning the 1Gigabyte git repo like you suggest would also mean that I'd
> need to compile drm driver code with the kernel version that in that repo
> too right? Or I can copy the gpu/drm/i915 over to my kernel version and
> it'll work?
Yes, you must rebuild kernel with updated drm driver and
(In reply to Mika Kahola from comment #55)
> Created attachment 120493 [details] [review]
> Disable fast link training when resuming
>
> Tom - thank you for you feedback and logs. I think I need to disable the
> fast link training feature when resuming from the suspend state. This patch
> does
Mika - firstly thank you for fixing the original issue, it's great to be
able to use the laptop.
I've applied your additional patch and the flickering on resume from
sleep continues. I've uploaded the dmesg and syslog - there is a lot of
drm debug in the syslog after the resume from sleep.
--
Created attachment 120485
dmesg with drm.debug=14
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Title:
Screen flickering in Intel i915 driver
Status in Nouveau
I've experienced exactly the same problem, as Tom Furniss described.
Kernel version: 4.2.6-301.fc23.x86_64
dmesg with drm.debug=14 attached.
I'm failed to apply patches, files structure in drivers/gpu/drm/i915/ is
slightly different.
If there is any other options for me to fix issue?
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You
Created attachment 120481
dmesg for resume from sleep flickering
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Title:
Screen flickering in Intel i915 driver
Created attachment 120480
Syslog for resume from sleep flickering
Sleep initiated at 13:03.
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Title:
Screen
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https://bugs.freedesktop.org/show_bug.cgi?id=91393.
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** Also affects: libdrm (Ubuntu)
Importance: Undecided
Status: New
** Bug watch added: freedesktop.org Bugzilla #91393
https://bugs.freedesktop.org/show_bug.cgi?id=91393
** Also affects: nouveau via
https://bugs.freedesktop.org/show_bug.cgi?id=91393
Importance: Unknown
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