Public bug reported:
[Summary]
1. The system will hang on when the HDMI external monitor is connected.
2. The system will hang on after the HDMI external monitor is unplugged.
3. The system will show no display when the HDMI external monitor is unplugged,
but the system not hangs on.
a. if connect HDMI external monitor back, the system will hang on.
b. if connect type-c HDMI external monitor, the system works well.
Note:
1. Only built-in HDMI can duplicate.
2. FHD/4K monitor both can duplicate
[Steps to reproduce]
2. Boot to OS
3. Connect external montior on HDMI port.
[Expected result]
The system can work well when the external monitor is connected.
[Actual result]
The system hangs on with the HDMI external monitor.
[Failure rate]
2/3
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux-firmware (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-firmware (Ubuntu Focal)
Importance: Undecided
Status: New
** Affects: linux-firmware (Ubuntu Impish)
Importance: Undecided
Status: New
** Affects: linux-firmware (Ubuntu Jammy)
Importance: Undecided
Status: New
** Tags: oem-priority originate-from-1968546 originate-from-1969726 stella
** Tags added: oem-priority originate-from-1968546 stella
** Tags added: originate-from-1969726
** Also affects: linux-firmware (Ubuntu Impish)
Importance: Undecided
Status: New
** Also affects: linux-firmware (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux-firmware (Ubuntu Focal)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1970293
Title:
The system hangs when HDMI external monitor involved on AMD Yellow
Carp platforms
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