[Bug 211807] [drm:drm_dp_mst_dpcd_read] *ERROR* mstb 000000004e6288dd port 3: DPCD read on addr 0x60 for 1 bytes NAKed

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=211807

pavol.harar at gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pavol.harar at gmail.com

--- Comment #2 from pavol.harar at gmail.com ---
I am experiencing the aforementioned error as well.

[drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 00000000f00db6df port
0: DPCD read on addr 0x4b0 for 1 bytes NAKed

I have problems connecting my ThinkPad X1 Carbon 7gen to two external DP
monitors via a ThinkPad USB-C gen2 docking station. Linux is not officially
supported for this dock unfortunately. The problem is that the monitors work,
but seemingly randomly they stop working, either I try to go to Ubuntu settings
or try to open some program with a keyboard shortcut. The monitors flicker,
then die and I have to reboot. Sometimes just reconnecting the cable works, but
usually not. Sometimes when I connect my phone to the dock the monitors start
working again, but most often not. There is a lot of people having these
problems but I have not found any solution. In dmseg only this error appears. I
am to the best of my knowledge up to date with everything, kernel, bios,
firmware etc.

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.