I have similar problem with AMD graphics Renoir (Is it the same problem as this issue #1870736 ?). I can scale display from 100% to 200%, but scaling to 125% or 150% fails (see log below). At least I'm able to scale text to 1.25.
syslog: ------- Aug 15 18:36:47 yoga gnome-shell[9538]: Impossible to set scaling on crtc 925 to 0,625000, error id 2 Aug 15 18:36:47 yoga gnome-shell[9538]: Window manager warning: Scalig CRTC 925 at 1,000000 failed Used HW/SW: ----------- * Lenovo Yoga Slim 7 14ARE05 (Ryzen 4700u, Integrated AMD Radeon Graphics), * Ubuntu 20.04.1 $ lspci 03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Renoir (rev c2) Kernel modules: amdgpu $ xrandr xrandr: Failed to get size of gamma for output default Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080 default connected primary 1920x1080+0+0 0mm x 0mm 1920x1080 77.00* -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1870736 Title: [nvidia] Screen scaling 125% gives 200% To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1870736/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
