[Bug 2085456] Re: Fix phantom monitor on some machines with kernel 6.11

Verified on DNT-VT-C1_202409-35381 with the `xrandr` command. The output
doesn't show the unknown Display anymore.

** Tags removed: verification-needed-noble-linux-oem-6.11
** Tags added: verification-done-noble-linux-oem-6.11

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https://bugs.launchpad.net/bugs/2085456

Title:
Fix phantom monitor on some machines with kernel 6.11

Status in linux package in Ubuntu:
New
Status in linux-oem-6.11 package in Ubuntu:
New
Status in linux source package in Noble:
New
Status in linux-oem-6.11 source package in Noble:
Fix Committed
Status in linux source package in Oracular:
New
Status in linux-oem-6.11 source package in Oracular:
New
Status in linux source package in Plucky:
New
Status in linux-oem-6.11 source package in Plucky:
New

Bug description:
[SRU Justification]

[Impact]
There will be a confusing phantom monitor shown on the display list, but actually no extra monitor are connected.

[Fix]
The bug is caused by the commit https://github.com/torvalds/linux/commit/b49420d6a1aeb399e5b107fc6eb8584d0860fbd7 in 6.11. Needs to introduce the 6.12 fix https://github.com/torvalds/linux/commit/ad604f0a4c040dcb8faf44dc72db25e457c28076.

[Test Case]
1. Make sure no external monitor connected
2. Power on the particular machine
3. Issue the command on Terminal `DISPLAY=:0 xrandr -q`.
4. Check if there's a "Unknown 23" monitor" on the display list

[Where problems could occur]
Need to check on more machines with different configurations. It only happens on 6.11 and it only affects the SCREEN INFO displayed.

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