** Changed in: linux-oem-6.1 (Ubuntu Lunar)
Status: New => Invalid
** Changed in: linux (Ubuntu Jammy)
Assignee: (unassigned) => Chris Chiu (mschiu77)
** Changed in: linux (Ubuntu Lunar)
Assignee: (unassigned) => Chris Chiu (mschiu77)
** Changed in: linux (Ubuntu Mantic)
Assignee: (unassigned) => Chris Chiu (mschiu77)
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-6.1 in Ubuntu.
https://bugs.launchpad.net/bugs/2024273
Title:
Fix eDP only displays 3/4 area after switching to mirror mode with
external HDMI 4K monitor
Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-6.1 package in Ubuntu:
Invalid
Status in linux source package in Jammy:
Incomplete
Status in linux-oem-6.1 source package in Jammy:
Fix Released
Status in linux source package in Lunar:
In Progress
Status in linux-oem-6.1 source package in Lunar:
Invalid
Status in linux source package in Mantic:
In Progress
Status in linux-oem-6.1 source package in Mantic:
Invalid
Bug description:
[Impact]
Panel on laptops connect to some 4K monitors via HDMI only display 3/4 area
on eDP after switching to mirror mode.
[Fix]
Backport a fix from Intel on
https://cgit.freedesktop.org/drm-tip/commit/?id=a2da67028cd05516343533c1609fcaf037237fed.
[Test]
1. Power on the laptop
2. Connect a 4K monitor (4k Benq EL2870U, 4k HP z27Kg3, 2k ASUS PA27AC) to
the laptop with HDMI cable.
3. Switch to mirror mode from default Joint Mode
4. Verify there's no obvious blank space on the leftmost/rightmost side of
the laptop's panel.
[Where problems could occur]
Only observed after connecting with some particular 4K monitors. It's a
generic fix to accept arbitrary refresh rate for more advanced panels. Should
be low risk to old machines.
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/2024273/+subscriptions
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