Bug 94806 - Failed to prepare CRTC for page flipping, disabling TearFree
Summary: Failed to prepare CRTC for page flipping, disabling TearFree
Status: NEW
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/intel (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Chris Wilson
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-04-03 19:02 UTC by william
Modified: 2016-06-19 06:50 UTC (History)
1 user (show)

See Also:
i915 platform: SKL
i915 features:


Attachments
xorg log (39.36 KB, text/plain)
2016-04-03 19:02 UTC, william
no flags Details
dmesg (103.47 KB, text/plain)
2016-04-03 19:03 UTC, william
no flags Details

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Description william 2016-04-03 19:02:56 UTC
Created attachment 122686 [details]
xorg log

I can't enable tearfree on skylake.

-- system architecture: x86_64
-- kernel version: 4.5.0-040500-generic
-- Linux distribution: xubuntu 16.04
-- Machine or mother board model: Supermicro X11SSZ-F
-- Display connector: 3 displays: 1 DIV, 2 via displayport MST. One displayport using active adapter to enable use of dual link DVI monitor. Issue occurs without MST hub as well.

xorg conf:

Section "Extensions"
        Option "XVideo" "Disable"
EndSection

Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "AccelMethod" "sna"
   Option      "TearFree" "true"
   Option      "DRI" "true"
#   Option      "DRI" "3"
   # VideoRam 461632   # sometimes (before i updated the bios, it were useful)
EndSection

xserver-xorg-video-intel                    2:2.99.917+git20160325-1ubuntu0.1

TearFree won't take, with xorg log reporting:

(EE) intel(0): Failed to prepare CRTC for page flipping, disabling TearFree
Comment 1 william 2016-04-03 19:03:21 UTC
Created attachment 122687 [details]
dmesg
Comment 2 kolp 2016-06-19 06:46:51 UTC
I'm also affected by this:

Debian Jessie, kernel 3.16, xserver-xorg-video-intel 2:2.99.917+git20160522-1~bpo8+1, Haswell Refresh CPU/IGP, with external display connected through VGA.


On my system, tearfree works just fine, but after some time, maybe some suspending actions, it breaks, and I get the error my my Xorg log


Failed to prepare CRTC for page flipping, disabling TearFree


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