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[Bug 1883497] [NEW] Only timing mode list in EDID supported on continuous freq monitors

To: ubuntu-translations-coordinators@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <1883497@xxxxxxxxxxxxxxxxxx>
Date: Tue, 02 Feb 2021 22:12:54 -0000
Reply-to: Bug 1883497 <1883497@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

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[Impact]
Some new laptop display set EDID continuous freq bit 1.
Then Xorg only uses the timing modes defined in EDID, no other modes are shown on Xorg.

Upstream Bug:
https://gitlab.freedesktop.org/drm/intel/-/issues/313

Fix of Xorg in merge request:
https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/421

https://cgit.freedesktop.org/xorg/xserver/commit/?id=6a79a737e2c0bc730ee693b4ea4a1530c108be4e

this is required to support new laptop models which use such panels

[Test case]
Test that a proper list of modes is shown with a panel that uses the new EDID.

[Regression potential]
The patch retains the previous code path for setting modes on GTF-able monitors, and only adds support for non-GTF monitors. So in that sense there shouldn't be any regression potential, this has been reviewed by an upstream expert.

** Affects: hwe-next
     Importance: Undecided
         Status: New

** Affects: ubuntu-translations
     Importance: Undecided
         Status: New

** Affects: xserver-xorg-video-intel
     Importance: Unknown
         Status: Unknown

** Affects: xorg-server (Ubuntu)
     Importance: Critical
     Assignee: Timo Aaltonen (tjaalton)
         Status: Fix Released

** Affects: xorg-server (Ubuntu Bionic)
     Importance: Undecided
     Assignee: Timo Aaltonen (tjaalton)
         Status: Fix Released

** Affects: xorg-server-hwe-18.04 (Ubuntu Bionic)
     Importance: Undecided
         Status: Fix Released

** Affects: xorg-server (Ubuntu Focal)
     Importance: Undecided
     Assignee: Timo Aaltonen (tjaalton)
         Status: Fix Released

** Affects: xorg-server (Ubuntu Groovy)
     Importance: Undecided
     Assignee: Timo Aaltonen (tjaalton)
         Status: Fix Committed


** Tags: oem-priority originate-from-1881988 originate-from-1882188 originate-from-1883198 sutton verification-done-bionic verification-done-focal verification-needed verification-needed-groovy
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Only timing mode list in EDID supported on continuous freq monitors
https://bugs.launchpad.net/bugs/1883497
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