Hi,

Am Mi den  5. Jul 2023 um 12:59 schrieb Bastian Blank:
> On Wed, Jul 05, 2023 at 11:31:06AM +0100, Klaus Ethgen wrote:
> > > But this is what you want, you want to use the full resolution of the
> > > output and scale the output (this is called HiDPI).  If you try to
> > > change the resolution to a non-native one, everything gets mushy.
> > No, I don't want the full resolution. It is unreadable. I usually use
> > 1920x1200 which is exactly 1/4 of the resolution so nothing gets mushy.
> 
> So you use full resolution and 200% scaling.

If you see it that way, yes. Just on X level.

> Anyway, I can't reproduce this using amdgpu on:
> 
> | % uname -a
> | Linux steamhammer 6.3.0-2-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.3.11-1 
> (2023-07-01) x86_64 GNU/Linux
> 
> | % lspci -nn | grep VGA
> | 06:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. 
> [AMD/ATI] Renoir [1002:1636] (rev c1)

I see that bug on two systems (both lenovo) but with Rembrandt GPU.

> | % cat /sys/class/drm/card0-DP-1/modes | head -n 10

Well, the display is the eDP, currently I have no other display
connected.

On the buggy kernel, I have only the native resolution in that sys file
and in the kernel before I see 12 entries.

Regards
   Klaus
-- 
Klaus Ethgen                                       http://www.ethgen.ch/
pub  4096R/4E20AF1C 2011-05-16            Klaus Ethgen <kl...@ethgen.ch>
Fingerprint: 85D4 CA42 952C 949B 1753  62B3 79D0 B06F 4E20 AF1C

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