[Bug 101225] New: Mouse pointer flickers when --scale is applied via xrandr

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101225

            Bug ID: 101225
           Summary: Mouse pointer flickers when --scale is applied via
                    xrandr
           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: thilo at ginkel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 131562
  --> https://bugs.freedesktop.org/attachment.cgi?id=131562&action=edit
dmesg

Hi there,

as discussed with mupuf on #intel-gfx yesterday I am getting an ugly mouse
pointer flickering after installing Linux (KDE/Plasma 5.9) on my new ThinkPad
T470p (Kaby Lake, HD Graphics 630, Nvidia graphics disabled via ACPI,
modesetting). I have three monitors attached (one built-in HiDPI screen, two
external ones). I have been able to track down the screen flicker to using
--scale 0.75x0.75 on eDP-1 (the internal screen) via xrandr (I need to apply
some screen-specific scaling due to the two external screens being normal DPI
and the internal one being HiDPI).

I am using Arch Linux and hit the issue on both the regular Kernel 4.11.2 and
the LTS Kernel 4.9.30.

$ uname -a
Linux vega 4.11.2-1-ARCH #1 SMP PREEMPT Mon May 22 06:53:49 CEST 2017 x86_64
GNU/Linux

Linux distribution: Arch Linux (x86_64)

Machine or mother board model: Lenovo ThinkPad T470p (i7-7820HQ)

Display connector: 1x eDP (2560x1440 internal 14" screen) 2x DP (2560x1440
external 25" screens connected via Lenovo Ultra Dock)

Video recording of flicker: https://goo.gl/photos/E1aspC36Zs967sUV6

dmesg output and Xorg log attached.

xrandr command line:
-- 8< --
/usr/bin/xrandr -d :0.0 --output DP-3-2 --mode 2560x1440 --pos 0x0 --rotate
normal --primary --output DP-3-1 --mode 2560x1440 --pos 2560x0 --rotate normal
--output eDP-1 --mode 2560x1440 --pos 5120x774 --rotate normal --scale
0.75x0.75
-- 8< --

Please let me know if you need any further details.

Thanks,
Thilo

-- 
You are receiving this mail because:
You are the assignee for the bug.
You are the QA Contact 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/20170529/55a557b9/attachment.html>