[Bug 94104] New: Baytrail Improperly redrawn graphics when xterm scrolls

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94104

            Bug ID: 94104
           Summary: Baytrail Improperly redrawn graphics when xterm
                    scrolls
           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: martin.rogers at curtisswright.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 121696
  --> https://bugs.freedesktop.org/attachment.cgi?id=121696&action=edit
dmesg after glitch happened

I’m seeing weird video glitches on the Intel BayLey Bay –i CRB board, with
Fedora 21, XFCE, and I hope someone can help.

This board has a dual-core ATOM SOC, similar to E3845.

Reproduced on Fedora 21's 3.17.4 and 4.1.13 kernels; and 4.3.0 kernel
(https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.3.tar.xz) also.

To recreate, open an xfce4-term.  Generate some output until the cursor is at
the bottom (so the next command will cause scrolling).  Wait a few minutes. 
Type “ls” (or echo, or most anything; even ssh’ing into the board and doing a
“wall hello”, so that the terminal scrolls, can do it).

An area of the terminal window, and sometimes part of the desktop outside of
the terminal, will be either a solid, text-colored, rectangle, or a “garbled”
area resembling “warped” or torn text, at an odd angle.
Pic attached shoiwng "torn" text.

Hitting Enter or otherwise scrolling again will redraw the window properly;
however, moving another 
terminal window over the anomaly and back will NOT cause the glitchy window to
be properly redrawn.

Attached output of intel_reg_dumper and dmesg after it happened; also, output
of 
/sys/devices/pci0000:00/0000:00:02.0/rom ("vbios.dump"); and the X log
(Xorg.0.log).

Kernel cmdline included "drm.debug=0xe".

Versions of some X stuff:
xorg-x11-drv-vesa-2.3.2-19.fc21.x86_64
xorg-x11-xkb-utils-7.7-12.fc21.x86_64
xorg-x11-drv-synaptics-1.8.1-4.fc21.x86_64
xorg-x11-drv-qxl-0.1.2-1.fc21.x86_64
xorg-x11-server-Xorg-1.16.3-2.fc21.x86_64
xorg-x11-drv-vmware-13.0.2-5.20140613git82c9b0c.fc21.x86_64
xorg-x11-drv-vmmouse-13.0.0-13.fc21.x86_64
xorg-x11-drv-evdev-2.9.1-2.fc21.x86_64
xorg-x11-drv-modesetting-0.9.0-2.fc21.x86_64
xorg-x11-xinit-1.3.4-3.fc21.x86_64
xorg-x11-drv-nouveau-1.0.11-1.fc21.x86_64
xorg-x11-drv-openchrome-0.3.3-12.fc21.x86_64
xorg-x11-drv-ati-7.5.0-1.fc21.x86_64
xorg-x11-drv-intel-2.99.916-3.20141117.fc21.x86_64
xorg-x11-drv-fbdev-0.4.3-19.fc21.x86_64
xorg-x11-server-common-1.16.3-2.fc21.x86_64
xorg-x11-utils-7.5-16.fc21.x86_64
xorg-x11-font-utils-7.5-25.fc21.x86_64
xorg-x11-fonts-ISO8859-1-100dpi-7.5-14.fc21.noarch
xorg-x11-drv-wacom-0.25.0-2.fc21.x86_64
xorg-x11-xauth-1.0.9-2.fc21.x86_64
xorg-x11-server-utils-7.7-10.fc21.x86_64

Thank you all,
Martin Rogers

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