Created attachment 110862 [details] Dmesg after a resume I've been having severe problems with docking with my Lenovo T540p using an external dock (which uses a MST hub in the dock). The system will often hang, crash, or simply not recognize the external monitor until I restart the X server. I've documented a number of these problems on the dri-devel mailing list for example, with the subject line "Re: WARNING: /usr/projects/linux/linux/drivers/gpu/drm/i915/intel_pm.c:6585 intel_display_power_put+0x4b/0x116 [i915]()". This is a new one. This morning, I was docked and using a Dell 30" monitor. I reconfigured the X server to stop sending video to the external monitor, suspended the laptop, and after it was suspended undocked it and took it to work. Then I docked it at work, where it was connected to a powered off Dell 24" monitor, the system competely hung. One of the things that I've learned will unwedge the system after it hangs after unsuspend is to eject the laptop from the dock, and wait. Eventually the system did unwedge, and then I redocked it. Afterwards, I found the following in dmesg and in /sys/class/drm/card0/error. (See attached.)
Created attachment 110863 [details] Contents of /sys/class/drm/card0/error
Created attachment 110864 [details] XOrg.0.log
We seem to have neglected this bug. Apologies. Does the problem persist with latest kernels?
(In reply to Jani Nikula from comment #3) > We seem to have neglected this bug. Apologies. Does the problem persist with > latest kernels? Timeout. Assuming that it is fixed by now (there was ERROR: 0x00000104 (ie Invalid page directory entry error, Cacheline containing a PD was marked as invalid). If this is not the case, please re-test with latest kernel & Mesa to see if this issue is still occurring since there were improvements pushed in kernel and Mesa that will benefit to your system.
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