Bug#948955: wmaker: invisible windows and applications

[Peter Keel]

Package: wmaker
Version: 0.95.8-3
Severity: important

Dear Maintainer,

Some applications don't render a window at all, and others only as a 
sliver on WindowMaker. They work on fluxbox, indeed, you can change
the window manager while they are running, and suddenly the window 
becomes visible. Meanwhile application is running, as witnessed by 
the sound they're playing.

Some games on proton, such as "Rome: Total War" do have the problem,
but most importantly, virtualbox has it too.

The following are screenshots of a virtualbox-window (not the 
control panel-thingie of virtualbox, that always works, but the
window of a virtual machine)

https://temp.discordia.ch/virtualbox-window-wmaker-2020-01-15_08-43.png
That's all of it. And this is the SAME window on fluxbox (upper part only):
https://temp.discordia.ch/virtualbox-window-fluxbox-2020-01-15_08-47.png



-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (700, 'unstable'), (20, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.4.11 (SMP w/8 CPU cores; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE
Locale: LANG=en_GB, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages wmaker depends on:
ii  libc6           2.29-9
ii  libexif12       0.6.21-5.1
ii  libfontconfig1  2.13.1-2+b1
ii  libwings3       0.95.8-3
ii  libwraster6     0.95.8-3
ii  libwutil5       0.95.8-3
ii  libx11-6        2:1.6.8-1
ii  libxext6        2:1.3.3-1+b2
ii  libxinerama1    2:1.1.4-2
ii  libxpm4         1:3.5.12-1
ii  wmaker-common   0.95.8-3

Versions virtualbox installed:
ii  virtualbox                                                  6.1.0-dfsg-3                         amd64        x86 virtualization solution - base binaries
ii  virtualbox-dkms                                             6.1.0-dfsg-3                         amd64        x86 virtualization solution - kernel module sources for dkms
ii  virtualbox-ext-pack                                         6.1.0-1                              all          extra capabilities for VirtualBox, downloader.
ii  virtualbox-guest-additions-iso                              6.1.0-1                              all          guest additions iso image for VirtualBox
ii  virtualbox-qt                                               6.1.0-dfsg-3                         amd64        x86 virtualization solution - Qt based user interface

-- no debconf information