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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
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- Registered: 2012-09-03
- Posts: 61,670
Re: [SOLVED] Internal display rescale glitching ThinkPad T14 Gen 3
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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
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- 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 
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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