I came across this bug because of my problem which I described in https://askubuntu.com/questions/1314639/weird-graphics-artifacts- monitor-off-with-ubuntu-20-04-and-nvidia-rtx-5000/1343876#1343876
In my case the Dell monitors tell, they can support 30bit. I came to the conclusion, that the dockingstation's Displayports cannot handle 30bit which leads to strange screen artifacts. However, the HDMI port of the dockingstation outputs 24bits and I have no screen corruption, connecting them directly to laptop is also no problem. In Windows the output is limited at 24bits and the output is reliable. xrandr with "max bpc" 8" is not working me and brings strange errors. Is there any other way to tell Linux system to limit to 24bits? Even before the Desktop appears the console has already switched to 30 bit (according to Monitor OSD info) without any EDID hacking? The Laptop is used daily across different dockingstations with different monitors (Home/Work) System config: - Dell Precision 15" 7540, Xeon E-2286M@2.4GHz, 128 GB ECC RAM, NVIDIA Quadro RTX 5000 16GB VRAM - Dockingstations at Home and offices: WD19DC - Dockingstation 1 WD19DC: 2xDell 43' U4320Q - Dockingstation 2 WD19DC: 2xDellxU3818DW, 37.5" + Laptopdisplay ** Attachment added: "Edid of Dell 43' U4320Q" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1890772/+attachment/5502614/+files/edid_U4320Q_Linux.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: No signal on 4K 60Hz DisplayPort monitor by default, until "max bpc" is lowered to 8 To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-control-center/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
