Fix no picture from HDMI when it's plugged after boot
Bug #1924238 reported by
Kai-Heng Feng
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Fix Released
|
Medium
|
Unassigned | ||
Focal |
Won't Fix
|
Undecided
|
Unassigned | ||
Hirsute |
Fix Released
|
Medium
|
Unassigned | ||
linux-oem-5.10 (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Focal |
Fix Released
|
Medium
|
Unassigned | ||
Hirsute |
Invalid
|
Undecided
|
Unassigned |
Bug Description
[Impact]
On Intel CML desktop, there's no HDMI output when the cable is not
connected pre-boot.
[Fix]
Properly handle lane polarity so the driver can write different values
to the register to enable the port.
[Test]
1. Boot with DP display.
2. Connect HDMI under GNOME desktop.
3. No picture on HDMI monitor.
With the fix applied, the issue is resolved.
[Where problems could occur]
If the BIOS VBT table is not correct, which did happen in the pase, this
fix may break those ports.
Changed in linux (Ubuntu Focal): | |
status: | New → Won't Fix |
Changed in linux (Ubuntu Hirsute): | |
status: | New → Confirmed |
importance: | Undecided → Medium |
Changed in linux-oem-5.10 (Ubuntu Focal): | |
status: | New → Confirmed |
importance: | Undecided → Medium |
Changed in linux-oem-5.10 (Ubuntu Hirsute): | |
status: | New → Invalid |
tags: | added: oem-priority originate-from-1908030 stella |
Changed in linux-oem-5.10 (Ubuntu Focal): | |
status: | Confirmed → Fix Committed |
Changed in linux (Ubuntu): | |
status: | Confirmed → Fix Committed |
Changed in linux (Ubuntu Hirsute): | |
status: | Confirmed → Fix Committed |
tags: |
added: verification-done-focal verification-done-hirsute removed: verification-needed-focal verification-needed-hirsute |
Changed in hwe-next: | |
status: | New → Fix Released |
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This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification- needed- focal' to 'verification- done-focal' . If the problem still exists, change the tag 'verification- needed- focal' to 'verification- failed- focal'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.
See https:/ /wiki.ubuntu. com/Testing/ EnableProposed for documentation how to enable and use -proposed. Thank you!