Bug 79716 - [regression] i915_enable_fbc != 0 for HD Graphics 5000
Summary: [regression] i915_enable_fbc != 0 for HD Graphics 5000
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: XOrg git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Imre Deak
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-06-06 09:35 UTC by Jon Kristensen
Modified: 2017-07-24 22:53 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments

Description Jon Kristensen 2014-06-06 09:35:59 UTC 
Using the Debian Unstable and Experimental versions of xserver-xorg-video-intel (2:2.21.15-2+b1 and 2:2.99.911+git20140529-1~exp2, respectively), the driver does not set i915_enable_fbc=0 for HD Graphics 5000.

By default, the X session can only be displayed for less than one second at the time. By switching away from X (Ctrl+Alt+F1), and then back (Ctrl+Alt+F7), I can see a working X session for less than a second.

Setting i915_enable_fbc to 0 seems to allow for normal X use.
Comment 2 Jani Nikula 2014-06-10 16:46:06 UTC 
commit 1f1a3fdf410dc35560d32c23eae307dce04f566e
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri Jun 6 10:37:11 2014 +0100

    drm/i915: Disable FBC by default also on Haswell and later

Thanks for the report and testing.
Comment 3 Daniel Vetter 2014-06-18 14:07:56 UTC 
Mark as regression for stats.

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