[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1926597
(Yes!)
I now do use a Debian 11 system:
Linux fthx 5.10.0-7-amd64 #1 SMP Debian 5.10.40-1 (2021-05-28) x86_64 GNU/Linux
and hdmi works as intended, FYI.
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Thanks for the update. I think using the HWE kernel is the best
compromise for the interim.
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Title:
Linux 5.10.0-1024.25 breaks HDMI with Intel
FYI I still do experience this bug with latest 1030 kernel oem.
No issue running 5.8 hwe or 5.11 hwe.
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Title:
Linux 5.10.0-1024.25 breaks HDMI
I don't have the time to compile kernels, at the moment.
But I tried latest CKT hwe kernel:
Linux 5.11.0-16-generic #17~20.04.5-Ubuntu SMP Tue Apr 27 07:37:47 UTC 2021
x86_64 x86_64 x86_64 GNU/Linux
And hdmi is working like a charm.
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Some instructions here:
https://wiki.ubuntu.com/KernelTeam/GitKernelBuild
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Title:
Linux 5.10.0-1024.25 breaks HDMI with Intel i915
To manage
Additionally:
1) boot without hdmi plugged
2) login to gnome session
3) plug in hdmi, nothing happens (but my monitor seems to detect something few
seconds but stays black)
4) enter laptop sleep
5) resume from sleep
6) hdmi monitor works as intended
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Unfortunately, I never compiled any kernel and don't know how to do it.
There's one thing I don't understand here: why hdmi does work in gnome
after having connected it *before* login in gdm?
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Ok. That means it's regressed by other commits.
Do you know how to compile a kernel? If so, please try the following repo with
drm-tip branch:
git://anongit.freedesktop.org/drm/drm-tip
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This one did not fix the issue.
(Booting again with 5.8 hwe kernel, I can still confirm that there is no
issue, as 5.10 < *-1024.)
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Title:
Please test this kernel:
https://people.canonical.com/~khfeng/lp1926597/
"drm/i915/display: Handle lane polarity for DDI port" is reverted.
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I cannot install this 5.12 kernel because dependencies issue against
libc6 (>2.33 needed).
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Title:
Linux 5.10.0-1024.25 breaks HDMI with Intel
Please test latest drm-tip kernel to make sure the bug is not present in
upstream:
https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/current/
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