| Summary: | [SKL] Oops when turning second external DP monitor off | ||||||||||||
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| Product: | DRI | Reporter: | Pierre Bossart <pierre-louis.bossart> | ||||||||||
| Component: | DRM/Intel | Assignee: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||||||
| Status: | CLOSED FIXED | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||||||
| Severity: | major | ||||||||||||
| Priority: | medium | CC: | intel-gfx-bugs, nathan.d.ciobanu | ||||||||||
| Version: | XOrg git | ||||||||||||
| Hardware: | x86-64 (AMD64) | ||||||||||||
| OS: | Linux (All) | ||||||||||||
| Whiteboard: | |||||||||||||
| i915 platform: | BXT, KBL, SKL | i915 features: | display/DP MST | ||||||||||
| Attachments: |
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Bug confirmed with drm-intel-nightly w/ Friday 12/2 code, see dmesg with drm.debug=0x1e attached. Created attachment 128336 [details]
dmesg w/ drm-intel-nightly from 12/2 with drm.debug=0x1e
Created attachment 128339 [details] [review] Suggested patch removes oops Reference to Pierre's patch: https://patchwork.freedesktop.org/series/16337/ Created attachment 128349 [details] [review] patch v2 based on Chris Wilson's suggestion I tested the patch and it fixed the bug. Thr patch mentioned in comment 5 fixes a skylake regression in ChromeOS. Can this patch be reviewed and merged? drm-misc-fixes commit bb08c04dc867b5f392caec635c097d5d5fcd8c9f Author: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Date: Tue Feb 14 14:49:21 2017 +0200 drm/dp/mst: fix kernel oops when turning off secondary monitor |
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Created attachment 128335 [details] kernel oops on fedora 24 v4.8.8 On SKL SkullCanyon NUC, turning off or changing input of second DP external monitor results in a kernel Oops reproducible 100% of the time. initial dmesg output captured over ssh attached, will run with latest drm/drm-intel-nightly later and add more information.