There are a few underruns reported there, just not as many as I
expected. What is strange though are the attempts to probe a TV. Can you
try testing video=SVIDEO-1:d (again append to the kernel commandline)
and seeing if that prevents the flicker?
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Always works fine now. This option solved the problem. But I want to
help solve this problem for another users. How can I help with debugging
this issue?
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So the issue is the false SVIDEO detection then. The g4x silicon was
quite flaky with its TV detection, but I thought we had it stable now.
Firstly: does your hardware even have an SVIDEO connector (composite out)?
Can you please attach the drm.debug=6 dmesg from boot so that we can see the
** Attachment added: More information about my system via apport with X option
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1185893/+attachment/3690704/+files/hpprobookglitch.apport.gz
** Description changed:
+ [Report]
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After logging in and boot time screen
What I suspect this is a display FIFO underrun. Can you please append
drm.debug=6 to your kernel command line (via grub) and attach a dmesg
from after you see flicking?
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Ok I did what you ask. I execute dmesg after 10 sec when flickering is
gone.
** Attachment added: Dmesg output after flickering
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1185893/+attachment/3690984/+files/dmesg_output.txt.gz
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I think that info also will be useful. What I find out additionaly is
that screen regulary flickering after switching from virtual terminal to
X (Ctrl+Alt+F1, Ctrl+Alt+F7, Ctrl+Alt+F1, Ctrl+Alt+F7).
** Attachment added: dmesg after flickering after virtual terminal switch
