https://bugzilla.kernel.org/show_bug.cgi?id=214369
Bug ID: 214369 Summary: Radeon HD5770 incorrect refresh rate via display port Product: Drivers Version: 2.5 Kernel Version: 5.14.2 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: roxmail@list.ru Regression: No
Created attachment 298751 --> https://bugzilla.kernel.org/attachment.cgi?id=298751&action=edit dmesg
Monitor connected via display port to radeon hd5770 card. Mouse cursor and windows movements are choppy, monitor says that video mode are 1920x1080 at 44Hz. $ xrandr Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 DisplayPort-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 600mm x 340mm 1920x1080 60.00*+ 59.94 3840x2160 30.00 2560x1440 59.95 1920x1080_59.94 59.94 1920x1080_59.55 59.53 1920x1080_59.57 59.57 1920x1080_59.56 59.56 1920x1080_59.53 59.53 1600x900 60.00 1280x1024 60.02 1280x800 59.81 1280x720 60.00 59.94 1024x768 60.00 800x600 60.32 720x480 60.00 59.94 640x480 60.00 59.94 HDMI-0 disconnected (normal left inverted right x axis y axis) DVI-0 disconnected (normal left inverted right x axis y axis) DVI-1 disconnected (normal left inverted right x axis y axis)
With 2560x1440 refresh rate are 27Hz (from monitor), and there are black screen while trying to set 3840x2160. I don't know whether it's regression. hdmi and dvi works as expected (at least with 1920x1080).