[Bug 1838979] Re: [i915] framebuffer console flickers on 5.0.0 kernel

2019-08-06 Thread Mathias Leyendecker
>do you have the bug only on tty
>or also on the desktop after 3 sec?

Only on tty, although the flickering briefly happens during boot and
shutdown, as Plymouth briefly switches to text mode before LightDM is
loaded. I do not know whether Plymouth itself is affected because it's
so quick anyway.

As I said in the OP, X.Org itself is not affected.

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Title:
  [i915] framebuffer console flickers on 5.0.0 kernel

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[Bug 1838979] Re: [i915] framebuffer console flickers on 5.0.0 kernel

2019-08-06 Thread lotuspsychje
See also bug: https://bugs.launchpad.net/ubuntu/+source/linux-
hwe/+bug/1838644

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Title:
  [i915] framebuffer console flickers on 5.0.0 kernel

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[Bug 1838979] Re: [i915] framebuffer console flickers on 5.0.0 kernel

2019-08-05 Thread Kai-Heng Feng
Please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.3-rc3/

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  [i915] framebuffer console flickers on 5.0.0 kernel

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[Bug 1838979] Re: [i915] framebuffer console flickers on 5.0.0 kernel

2019-08-05 Thread lotuspsychje
Thank you for providing more info, do you have the bug only on tty
or also on the desktop after 3 sec?

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  [i915] framebuffer console flickers on 5.0.0 kernel

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[Bug 1838979] Re: [i915] framebuffer console flickers on 5.0.0 kernel

2019-08-05 Thread Launchpad Bug Tracker
Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: linux-hwe (Ubuntu)
   Status: New => Confirmed

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  [i915] framebuffer console flickers on 5.0.0 kernel

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[Bug 1838979] Re: [i915] framebuffer console flickers on 5.0.0 kernel

2019-08-05 Thread Mathias Leyendecker
apport-collect did not create anything meaningful (exited with "Package 
linux-hwe not installed and no hook available, ignoring"), but I ran a few 
commands (including dmesg) to try to include a more complete report.
Please let me know if you need anything else.

My computer is the Clevo N750WU (laptop).

** Attachment added: "i915_bug.tar.gz"
   
https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/1838979/+attachment/5281057/+files/i915_bug.tar.gz

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  [i915] framebuffer console flickers on 5.0.0 kernel

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[Bug 1838979] Re: [i915] framebuffer console flickers on 5.0.0 kernel

2019-08-05 Thread lotuspsychje
Thank you for making ubuntu better!

To file bugs please use ubuntu-bug packagename in the future so relevant info 
collects
into your bug and developers can debug more easy that way.

In this stage you can still collect the info with: apport-collect bugID

Could you please also add the model/type of your computer in your bug
description?

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Title:
  [i915] framebuffer console flickers on 5.0.0 kernel

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[Bug 1838979] Re: [i915] framebuffer console flickers on 5.0.0 kernel

2019-08-05 Thread Mathias Leyendecker
** Description changed:

  Since upgrading to kernel 5.0.0-23-generic, the framebuffer tty is
  unusable due to flickering like crazy, showing green rectangles instead
  of a console. X.Org and Plymouth still display correctly.
  
  In addition, the following message appears in dmesg:
  [ 9191.868497] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU 
pipe A FIFO underrun
  [ 9687.876764] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU 
pipe A FIFO underrun
  
  My GPU is Intel UHD Graphics 620.
  
  The problem does not occur on the 4.18.0-25-generic kernel, which
  implies this might be a problem with the kernel, or the i915 module.
  
  Description:  Ubuntu 18.04.2 LTS
  Release:  18.04
  
+ Architecture: amd64
+ 
  linux-generic-hwe-18.04 version 5.0.0.23.80
  
  In case this is relevant:
  xserver-xorg-video-intel-hwe-18.04 version 
2:2.99.917+git20171229-1ubuntu1~18.04.1
  xserver-xorg-video-fbdev-hwe-18.04 version 1:0.5.0-1ubuntu1~18.04.1

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  [i915] framebuffer console flickers on 5.0.0 kernel

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