[Bug 90725] New: Display chunks with xorg intel driver with Accel & when using swap space

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90725

            Bug ID: 90725
           Summary: Display chunks with xorg intel driver with Accel &
                    when using swap space
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: fabstz-it at yahoo.fr
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 116114
  --> https://bugs.freedesktop.org/attachment.cgi?id=116114&action=edit
Display chunks

Hello,

I have some display chunks as soon as I use some of my swap space. I noticed it
first with a VirtualBox VM as it generally needs space from my swap partition.
But it also appears when compiling programs as soon as it requires the swap
partition.

I'm on an up-to-date Debian stable (jessie) (kernel 3.16.7-ckt9-3~deb8u1
x86_64) and my Xorg uses
intel driver.
The issue appears with default config (no xorg.conf, ie. driver intel, with DRI
& Accel).
But I found this workaround : using either of these options in xorg.conf hides
the issue
    Option        "NoAccel"     "on"
    Option        "AccelMethod" "off"

Using driver fbdev is another workaround

The other AccessMethods "UXA, SNA, blt" and DRI=off won't workaround the issue.

BTW: Compiling & installing the last version of xserver-xorg-video-intel from
experimental (2:2.99.917) doesn't fix the issue. Neither Mesa 10.5.5, nor
kernel 4.0.2 fixes it.

Regards


NB : I initially reported this bug in debian
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=780363

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