** Tags added: ubuntu-certified
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https://bugs.launchpad.net/bugs/1872034
Title:
[Focal] No HDMI output through thunderbolt docking station
Status in OEM Priority
** Tags added: oem-priority
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Title:
[Focal] No HDMI output through thunderbolt docking station
Status in OEM Priority
could you test mainline builds 5.5..5.6?
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Title:
[Focal] No HDMI output through thunderbolt docking station
Status in OEM
seems to be the same with a 'Cable Matters' tb-dock with displayport
hooked to a 4k screen, only mirrored output works
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Title:
** Changed in: linux (Ubuntu)
Importance: Undecided => High
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Title:
[Focal] No HDMI output through thunderbolt docking
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Changed in: xorg-server (Ubuntu)
Status: Incomplete => Invalid
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The issue only reproduced on first thunderbolt port which next to escape
key.
** Attachment added: "dmesg-5.4.0-21-switch-fail.log"
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1872034/+attachment/5355433/+files/dmesg-5.4.0-21-switch-fail.log
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The issue only reproduced on first thunderbolt port which next to escape key.
The external monitor doesn't lit up even though xrandr shows it is connected.
Switching output modes by hotkey or GUI doesn't help.
xrandr output:
...
DP-2-3 connected 1920x1080+0+0
...
** Attachment added:
Can not reproduce the issue with drm-tip kernel (#3).
** Attachment added: "dmesg-5.5.0-rc1-drm-tip.log"
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1872034/+attachment/5355435/+files/dmesg-5.5.0-rc1-drm-tip.log
** Changed in: oem-priority
Status: New => Triaged
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** Changed in: oem-priority
Importance: Undecided => High
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Title:
[Focal] No HDMI output through thunderbolt docking
@Gavin,
Would you please try the drm-tip kernel with drm debug option "drm.debug=0xe
log_buf_len=4M" ?
Also, please provide the output of `fwupdmgr get-devices`.
** Attachment added: "drm-tip-5.5.0-rc1.tgz"
** Also affects: oem-priority
Importance: Undecided
Status: New
** Changed in: oem-priority
Assignee: (unassigned) => Cyrus Lien (cyruslien)
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Please try logging in to 'Ubuntu on Wayland' and tell us if that avoids
the bug.
** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu)
** Changed in: xorg-server (Ubuntu)
Status: New => Incomplete
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