New subject: [Bug 48932] Wine does not display any windows unless `xrandr --auto` has been run

14 Apr 2020


      https://bugs.winehq.org/show_bug.cgi?id=48932
Bug ID: 48932
           Summary: Wine does not display any windows unless `xrandr
                    --auto` has been run
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winex11.drv
          Assignee: wine-bugs@winehq.org
          Reporter: claude@mathr.co.uk
      Distribution: ---
Created attachment 66899
  --> https://bugs.winehq.org/attachment.cgi?id=66899
`xrandr` output at the start of the X11 session (when Wine displays no windows)
Recent versions of Wine do not display any GUI windows on my Debian testing
(bullseye) desktop, unless I have previously run `xrandr --auto` in my X11
session.
I thought it was this bug but the cause is surely different:
https://bugs.winehq.org/show_bug.cgi?id=48647
Bisecting git between 4.0.3 (good) and 5.6 (bad) shows:
```
be54adcffc249a44cb52c24320a7ad3db758ba54 is the first bad commit
commit be54adcffc249a44cb52c24320a7ad3db758ba54
Author: Zhiyi Zhang zzhang@codeweavers.com
Date:   Fri Sep 20 16:55:22 2019 +0800
winex11.drv: Support XRandR display device handler.
XRandR supports multiple GPUs and runtime device change
    compared to Xinerama.
Signed-off-by: Zhiyi Zhang zzhang@codeweavers.com
    Signed-off-by: Huw Davies huw@codeweavers.com
    Signed-off-by: Alexandre Julliard julliard@winehq.org
configure                   |  20 ++
 configure.ac                |   7 +-
 dlls/winex11.drv/x11drv.h   |   1 +
 dlls/winex11.drv/xinerama.c |   2 +-
 dlls/winex11.drv/xrandr.c   | 488 ++++++++++++++++++++++++++++++++++++++++++++
 include/config.h.in         |   3 +
 6 files changed, 519 insertions(+), 2 deletions(-)
```
I will attach the output from `xrandr` before and after running `xrandr --auto`
for the first time in a session.  The diff shows that disconnected displays
have their resolutions removed by `xrandr --auto`, though they are labelled
disconnected in both instances.
BTW, my first attempts to bisect this were full of spurious failures, I finally
fixed it with shell stanza:
```
rm -fr ~/.wine &&
git clean -xf &&
CC="ccache gcc" CFLAGS="-g -O0" ./configure --enable-win64 --disable-tests &&
make -j 32 -k &&
./wine winecfg
# observe whether GUI is displayed, run `git bisect good` / `git bisect bad`
accordingly
```
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[Bug 48932] New: Wine does not display any windows unless `xrandr --auto` has been run