| Summary: | [GMBUS regression] Black screen on MacBookPro 8,2 (15") since e646d57 | ||
|---|---|---|---|
| Product: | DRI | Reporter: | Julian Simioni <julian.simioni> |
| Component: | DRM/Intel | Assignee: | Daniel Vetter <daniel> |
| Status: | CLOSED FIXED | QA Contact: | |
| Severity: | major | ||
| Priority: | medium | CC: | ben, chris, daniel, jbarnes |
| Version: | unspecified | ||
| Hardware: | x86-64 (AMD64) | ||
| OS: | Linux (All) | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: | |||
|
Description
Julian Simioni
2012-05-04 22:33:46 UTC
Created attachment 61064 [details]
Dmesg output
Created attachment 61065 [details]
intel_reg_dumper output
Just to double check: With e646d57 you get a black screen and with the commit right before that (i.e. 7a39a9d4767e8d22) everything works smoothly? Also please boot with drm.debug=0xe added to your kernel cmdline on both a broken and a working kernel (preferrable the two sha1 versions mentioned above) and attach the complete dmesg for both runs. Created attachment 61088 [details]
working dmesg output from 7a39a9d
Created attachment 61089 [details]
broken dmesg output from e646d57
Created attachment 61090 [details]
kernel config (same for both broken and working)
That's correct, 7a39a9d works great, e646d57 black screens. (Of course I didn't get lucky, i had to bisect :P ). Dmesg output attached as requested Shot in the dark: Can you try the linked patch on top of drm-intel-next-queued? https://bugs.freedesktop.org/attachment.cgi?id=60102 Created attachment 61203 [details]
dmesg output booting with edp-power-sequencing-fix.patch
Created attachment 61204 [details]
intel_reg_dumper output booting with edp-power-sequencing-fix.patch
No dice unfortunately. Dmesg and intel_reg_dumper output attached. Created attachment 61350 [details] [review] don't return -ENXIO Patch for you to try. The latest patch works when applied on aa104eb! Thanks! Created attachment 61885 [details] [review] improved patch after review Daniel Kurtz suggested a slightly alternative approach to fix this bug. Please test this new patch and check whether things still work out for you. Thanks. The new patch works great too. Patch merged to -fixes: commit 65e818660275ecda3702a4245f308923e3813a85 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Mon May 21 20:19:48 2012 +0200 drm/i915: be more careful when returning -ENXIO in gmbus transfer Thanks for reporting this bug! |
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