Bug 97135

Summary: [SKL] Monitor won't light back up after power down with OneLink+ dock
Product: DRI Reporter: Ben Widawsky <ben>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED NOTOURBUG QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: intel-gfx-bugs, lyude, pmenzel+bugs.freedesktop.org
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: SKL i915 features: display/Other

Description Ben Widawsky 2016-07-29 20:28:33 UTC 
As the summary says. If I leave my Lenovo X1 Yoga to idle, at some point X will shut down the displays. There is no unplugging of the dock. From this point forward, I am unable to bring the monitor back without rebooting the system. All attempts to xrandr result in an error reported in dmesg:
[drm:intel_mst_disable_dp [i915]] *ERROR* failed to update payload -2

I've not seen any such problems when not using the dock.

I get one such error message on a normal boot, but things work fine after that.
Comment 1 Ben Widawsky 2016-07-29 20:32:22 UTC 
Copy paste problem. It is error -22, not -2
Comment 2 Ben Widawsky 2016-08-02 15:32:33 UTC 
-nightly kernel as of last night works.
Comment 3 Ben Widawsky 2016-08-02 15:47:22 UTC 
(In reply to Ben Widawsky from comment #2)
> -nightly kernel as of last night works.

Just kidding. It fails differently.
Comment 4 Ben Widawsky 2016-08-09 17:05:12 UTC 
Updating to v2.30.000 (https://support.lenovo.com/us/en/documents/acc100252) seems to have made this problem go away.

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