Ubuntu Kylin sets the default monitor resolution to the highest possible resolution, rather than the native resolution, rendering the OS unusable with certain monitors

Bug #1985056 reported by Aaron Rainbolt
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
ukui-desktop-environment (Ubuntu)
New
Undecided
Unassigned

Bug Description

Hardware: HP Z220 SFF Workstation, 120 GB SSD, 32 GB RAM, EVGA NVIDIA 1050 Ti GPU.

Expected result: When "Try Ubuntu Kylin" is clicked from a live Ubuntu Kylin ISO, or when an installed Ubuntu Kylin system is logged into, the monitor's native resolution should automatically be selected, ensuring that the monitor functions ideally.

Actual result: Ubuntu Kylin appears to automatically set the screen resolution to the highest supported resolution of a monitor. On some monitors (like a particular LG monitor of mine), the highest supported resolution is wrongly reported (or wrongly detected?) as a resolution higher than the monitor can actually handle. This results in an out-of-range signal being sent to the monitor, which results in no visible video output from Ubuntu Kylin unless you switch to a TTY. This renders the OS virtually unusable.

Steps to reproduce:

1: Procure a monitor that wrongly reports its highest supported resolution as a resolution higher than it can actually support. (I discovered that my monitor does this by booting Ubuntu Studio and looking at the list of monitor resolutions - my monitor is 1600x900 but it appears to support Full HD, which it can't.)
2: Attach the monitor to your intended testing hardware.
3: Boot an Ubuntu Kylin 22.04 or 22.04.1 ISO on the testing hardware.
4: Select "Try Ubuntu Kylin". You will see UKUI briefly appear, then the screen will go black and report that the signal is out of range (that's what my monitor does).

Notes:

I will determine my monitor's particular model information at a later date and put it as a comment under this bug report.

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