https://bugzilla.kernel.org/show_bug.cgi?id=201795 Bug ID: 201795 Summary: [Regression] Wrong 4k resolution detected with DisplayPort to HDMI adapter on amdgpu Product: Drivers Version: 2.5 Kernel Version: 4.19.4 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@xxxxxxxxxxxxxxxxxxxx Reporter: thomas.lassdiesonnerein@xxxxxx Regression: No Created attachment 279677 --> https://bugzilla.kernel.org/attachment.cgi?id=279677&action=edit xrandr output on kernel 4.14 I have a AMD Fury X GPU connected to two 4k monitors. - one 4k iiyama monitor @DP 1.4 - one 4k LG OLED TV @DP 1.4 to HDMI 2.0 Adapter both have physical 3840x2160 pixels. On Kernel 4.14 (Manjaro) I can mirror the screen fine. Newer Kernels I tested (4.17 to 4.19) mirror too, but on the LG OLED TV with 4096x2160 instead of 3840x2160. The latter res then is not stretched correctly. I have small black bars left and right as if the driver thinks I would have 4096x2160 physically.If I set 4096x2160 in plasma5 it stretches fine, but then I have different resolutions on boths screens which is problematic while mirroring. -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
