Awesome, the kernel team fixed this in 24.10; Or the upstream patches have landed from another report.
I was really hoping this bug was fixed, breathing new extended life into a pretty good 16GB workstation, where my Lenovo X1 Yoga G6 can run again with dual 4K@60Hz 32". And it IS! Thank you for fixing, what I assume, most have been some kind of improper coordination between the window manager and the display hardware through the DRM subsystem. To recap, the working scenario this bug is based on, is where my *slightly* slower XPS 9380 can use a single TB3 port to a Dell WD19TB dock, where I can attach one DP1.2 4K@60Hz, and then a 2nd one via a USB-C dock (CM 201355-BLK) plugged into the TB3 port on the WD19TB. Both displays show kernel startup in sync, and switch to correct 4K@60Hz modes. On the X1 Yoga G6, as it is TB4, I already knew I couldn't use the single TB3 port to the WD19TB to drive both 4K@60Hz at the lower HBR2 rates required by Display1.2 using the same configuration. Using a 2nd TB4 port for the USB-C dock (CM 201355-BLK) should work. This is where I hit this bug, where some kind of wiring up of I expect if I plug both my 4K DP1.2 monitors into either dock (CM 201355-BLK or Dell WD19TB) everything probably looks fine, but one of the displays will be @30Hz. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2069511 Title: drm error on dual 4K@60Hz - one screen off and CRTC refresh not correct To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2069511/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
