|Summary:||Screen artifacting with 4.18+ kernels on AMD Radeon Vega 64 & 1440p 120hz+ monitors|
|Product:||DRI||Reporter:||Arek Tumas <mokurai82>|
|Component:||DRM/AMDgpu||Assignee:||Default DRI bug account <dri-devel>|
|Status:||RESOLVED MOVED||QA Contact:|
|Priority:||medium||CC:||harry.wentland, lee295012, nicholas.kazlauskas, pa5hgan, sunpeng.li|
|i915 platform:||i915 features:|
Description Arek Tumas 2018-09-22 08:36:24 UTC
I'm experiencing some interlacing on the right side of the screen of my 1440p 144hz monitor when using 4.18+ kernels and setting the monitor to 120+ hz It works fine with 100hz and lower, or older kernels, which seems to indicate some displayport bandwidth issue/regression. This happens regardless of the distro or mesa version. I'm using an RX Vega 64 with the opensource driver.
Comment 1 Michel Dänzer 2018-09-24 08:58:27 UTC
Please attach the dmesg output.
Comment 2 Nicholas Kazlauskas 2018-09-24 13:27:38 UTC
This is likely fixed. It may be worth testing the amd-staging-drm-next kernel from: https://cgit.freedesktop.org/~agd5f/linux/ or applying the proposed patch from the bug report at: https://bugzilla.kernel.org/show_bug.cgi?id=201067 Please let me know if you're seeing an issue with either of these.
Comment 4 Arek Tumas 2018-09-24 14:36:29 UTC
Yes it is probably the same bug. It's a right-most vertical interlaced line. I'm currently experiencing this bug in the newest ubuntu mainline kernel (4.19-rc5). [It's not an issue on 4.18.8 kernel] I'm relatively inexperienced, Applying kernel patches seems a little difficult for me. I only know how to install mainline kernels from ukuu or .deb files. I can try if someone links me clear instructions. Thank You for Your time and help. I hope this will be fixed in future Linux kernel versions.
Comment 5 Martin Peres 2019-11-19 08:56:37 UTC
-- GitLab Migration Automatic Message -- This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/537.