I'm running a Lenovo P14s AMD (basically same machine as T14 and similar to T14s), with gen 2 dock (latest firmware), running Ubuntu 21.04 latest updates, and I see this happen about every day, the external keyboard and mouse stop working, and sometimes the monitor stops working... sometimes just stops working when I come back to it, other times when I plug into the dock. Only solution is reboot. When I reboot I see a message like this:
drm:drm_dp_send_dpcd_read drm_kms_helper ERROR mstb port DPCD read on addr 0x60 for 1 bytes NAKed which freezes the machine and I have to do a hard reboot. I have not seen the issue on Windows and I have a lot of time running it with Windows also. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1908139 Title: ThinkPad T14s external display not working on ThinkPad USB-C Dock Gen2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1908139/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
