linux-kernel - drm: i915: regression in i915 after suspend (render ring initialization failed; v3.16.3)

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Message-ID: <20141001103405.GC472@kalium>
Date:	Wed, 1 Oct 2014 12:34:05 +0200
From:	Benjamin Block <bebl@...eta.org>
To:	Ville Syrjälä <ville.syrjala@...ux.intel.com>
Cc:	Ben Widawsky <benjamin.widawsky@...el.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	linux-kernel@...r.kernel.org
Subject: drm: i915: regression in i915 after suspend (render ring
 initialization failed; v3.16.3)

Hej,

since some kernel-versions I can't get my intel-card to work after I
suspended my laptop. I currently run stable v3.16.3. After (re-)boot, the
graphic-acceleration works fine; upon suspending the laptop to ram and
waking it up later, this pops up in the kernel-log:

[54251.683106] [drm:init_ring_common] *ERROR* render ring initialization
failed ctl 0001f001 (valid? 1) head 8163e50c tail 00000000 start
00042000 [expected 00042000]
[54251.683109] [drm:__i915_drm_thaw] *ERROR* failed to re-initialize
GPU, declaring wedged!

After that I can still use X normally, but everything that involves
acceleration won't work anymore (including videos and such). I saw there
was a fix for this some time ago, but it only got pulled into older stable
kernels. Is their any fix for this for newer kernels?

(kernel log and config attached)

-- 
                                                          best regards,
                                                            - Benjamin Block
--
oh okay. my mistake.
Yafcot:atj(*),
mark
* Yet another fool coming over this: according to joey
	-- mark@...l.novare.net

View attachment "linux-3.16.3.config" of type "text/plain" (108874 bytes)

View attachment "kernel.log" of type "text/plain" (273494 bytes)

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