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#1 2023-07-09 19:00:51

kiiito
Member
Registered: 2021-04-16
Posts: 4

[SOLVED] Internal display rescale glitching ThinkPad T14 Gen 3

I recently purchased a ThinkPad T14 Gen 3 with the AMD CPU+GPU and the 3840x2400 touchscreen.

Last week I had to do a presentation which was the first time I wanted to display the same content on the internal monitor and an external monitor. This did not work as expected, and I was able to reproduce the issue just by lowering the resolution of the internal monitor.

Instead of re-scaling the screen contents to fit the monitor size, the lower resolution content is tiled vertically and cut off at about a fourth of the width of the monitor (see image).

Since I haven't tried this before I can't say if it's a regression or just never worked at all, but I started with KDE on Wayland, and then tried it on X11, and with GNOME and Sway, with all exhibiting the same issue.

In GRUB I have gfxmode set to 1280x800x32 it is scaled as expected. So then I tried to set a lower resolution for the kernel with video=, but with that the systemd boot log also exhibits the same non-scaling and tiling. I'm running Kernel 6.4.1 and Mesa 23.1.3, and I haven't found anything else I could try.

Last edited by kiiito (2023-07-11 07:48:19)

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#2 2023-07-09 20:14:08

seth
Member
Registered: 2012-09-03
Posts: 61,670

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#3 2023-07-09 21:42:59

kiiito
Member
Registered: 2021-04-16
Posts: 4

Re: [SOLVED] Internal display rescale glitching ThinkPad T14 Gen 3

Ah thank you, I hadn't found that one due to the abbreviated title, but reverting to the last kernel indeed fixes it.

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#4 2023-07-10 06:45:27

seth
Member
Registered: 2012-09-03
Posts: 61,670

Re: [SOLVED] Internal display rescale glitching ThinkPad T14 Gen 3

If it helps you: I knew I'd seen the artifact and it still took me three search attempts to find the thread wink

Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

Last edited by seth (2023-07-10 06:46:06)

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