** Tags added: noble
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https://bugs.launchpad.net/bugs/1836858
Title:
Display flickers (monitor loses signal briefly) during "flickerfree"
boot, while showing the BIOS
** Changed in: plymouth
Status: Unknown => New
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https://bugs.launchpad.net/bugs/1836858
Title:
Display flickers (monitor loses signal briefly) during "flickerfree"
** Tags removed: groovy
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Title:
Display flickers (monitor loses signal briefly) during "flickerfree"
boot, while showing the BIOS
Yeah the problem seems to be getting worse in recent Ubuntu releases and
is more obvious on more laptops. That's good for testing at least.
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Affects me as well. Reproduced on:
* Dell XPS 7390, i7-10510U, integrated graphics, laptop screen
* Focal with latest updates
* Kernels:
* 5.8.0-55-generic (linux-image-generic-hwe-20.04)
* 5.13.0-rc4 (vanilla from mainline-ppa)
In the kernel log, "fb0: switching to inteldrmfb from EFI VGA"
Changed desktop monitors and the problem is now less severe, but still
present. I guess it's all to do with how fast the monitor can change
modes. And that a mode change is occurring at all. Although it seems to
be the same resolution.
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Thanks for the suggestion. Unfortunatley vt.handoff=1 did not improve
the situation.
** Tags added: groovy
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Title:
Display
Just throwing this into the ring...
try replacing $vt_handoff in the grub kernel line with vt.handoff=1
(from 18.04 to 20.04 it seems to have been changed from 1 to 7 to make
the handoff to plymouth more fluid as it loads its own copy of the
firmware splash to draw on).
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Done: https://gitlab.freedesktop.org/plymouth/plymouth/-/issues/102
** Bug watch added: gitlab.freedesktop.org/plymouth/plymouth/-/issues #102
https://gitlab.freedesktop.org/plymouth/plymouth/-/issues/102
** Also affects: plymouth via
Daniel, could get a debug log and report upstream?
https://wiki.ubuntu.com/Plymouth#Enabling_Debugging
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Title:
Display flickers
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