| Summary: | [HSW]Lenovo X1 OneLink Pro Dock + Lenovo 4k monitor fail | ||||||||
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| Product: | DRI | Reporter: | Benjamin Herrenschmidt <benh> | ||||||
| Component: | DRM/Intel | Assignee: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||
| Status: | CLOSED NOTABUG | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||
| Severity: | normal | ||||||||
| Priority: | medium | CC: | intel-gfx-bugs | ||||||
| Version: | DRI git | ||||||||
| Hardware: | x86-64 (AMD64) | ||||||||
| OS: | Linux (All) | ||||||||
| Whiteboard: | |||||||||
| i915 platform: | HSW | i915 features: | display/DP MST | ||||||
| Attachments: |
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Description
Benjamin Herrenschmidt
2015-10-06 01:12:17 UTC
Created attachment 118694 [details]
dmesg with errors
This is the dmesg after plugging, then unplugging the monitor, you can see all the master control interrupt errors.
I will do another dmesg with drm.debug in a minute. In the meantime, I tried --rate to use a 30Hz rate, and that did crash it. The symptom is a bit different that previous kernels though, the internal LCD didn't switch to displaying garbage, but it did hang. I recovered after a few seconds, but then all displays blinked (looked like it re-detected the external monitor) and this time everything hung. There was nothing in the sysfs "error" file after a reboot. Created attachment 118695 [details]
dmesg with drm.debug=0x1e
New dmesg
I tried again --mode/--rate to set --output DP2-2 to 30Hz but that locked up immediately this time. Still nothing in the error file. I will try ssh'ing next time in case the machine is still responsive but that will have to wait possibly til tomorrow. Let me know if there's anything else I can do such as capturing registers etc... Note that it works in Windows, however the dock output in that case is limited to 30Hz (I believe the OneLink docks are DP1.1 only). I've the same issue on an X1 Yoga with ubuntu xenial: marco@placebo:~/scripts$ uname -a Linux placebo 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux Please try current v4.6-rc kernels or, if that fails, drm-intel-nightly branch of http://cgit.freedesktop.org/drm-intel https://support.lenovo.com/gb/en/documents/pd029981 says the pro dock supports "DisplayPort with maximum resolution 2560x1600". Dock does not support 4k not a bug Except that it works in windows at 30Hz... Tons of fixes since 4.3/4.4 times, please try latest components. |
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