Issue #2834 has been reported by davshao.

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Bug #2834: Post 3.16 i915 drm freedesktop Bug 76554 one line fix
http://bugs.dragonflybsd.org/issues/2834

* Author: davshao
* Status: New
* Priority: High
* Assignee: 
* Category: 
* Target version: 
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After the update to Linux 3.16 i915 drm, Bug 76554 from freedesktop.org

https://bugs.freedesktop.org/show_bug.cgi?id=76554

manifests itself on an Intel(R) Core2 Quad CPU Q9400 with G45 integrated 
graphics:

drm0: taking over the fictitious range 0xd0000000-0xe0000000
error: [drm:pid1054:init_ring_common] *ERROR* render ring initialization failed 
ctl 0001f001 (valid? 1) head 05663004 tail 00000000 start 00003000 [expected 
00003000]
error: [drm:pid1054:i915_gem_init] *ERROR* Failed to initialize GPU, declaring 
it wedged

Fortunately Jiri Kosina found a 1-line workaround that is still there in the
Linux 4.0.8 code:

https://bugs.freedesktop.org/attachment.cgi?id=104224

This fix has been verified on the Q9400 machine to at least stop the error 
messages.




---Files--------------------------------
jiri.diff (627 Bytes)


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