[Bug 106850] New: Occasionally random uninitialised memory appears to be dumped when applications fullscreen or the VT is switched

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106850

            Bug ID: 106850
           Summary: Occasionally random uninitialised memory appears to be
                    dumped when applications fullscreen or the VT is
                    switched
           Product: DRI
           Version: unspecified
          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: fdbugs at fratti.ch
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 140069
  --> https://bugs.freedesktop.org/attachment.cgi?id=140069&action=edit
the bug occurring on tty2

Occasionally random uninitialised memory appears to be dumped when applications
fullscreen or the VT is switched

Occasionally, a pattern that looks like uninitialised memory is vomited on top
of the screen, usually when an application enters fullscreen, or a VT switch is
done.
Moving the mouse makes the pattern disappear in a Xorg VT, but not on the tty.

The regular look of the pattern makes me think that this is some area of
possibly kernel memory that is being dumped onto the framebuffer. It also
appears on top of everything.

Steps to reproduce:
1. fullscreen mpv with a video playing a bunch, or switch VTs a bunch
2. notice how the corruption disappears when the mouse cursor is moved

Occurrence with fullscreening mpv appears to happen in bursts and then not at
all for a while, which is why it's hard to put a number on the tries you need
to reproduce it.

✓ fratti at archbook ~ $ uname -m
x86_64
✓ fratti at archbook ~ $ uname -r
4.16.13-2-ARCH

Distribution: Arch Linux
Machine: Tuxedo InfinityBook 13" with Intel Corporation HD Graphics 620 (rev
02)
Display connector: eDP

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20180607/3fd07b95/attachment-0001.html>