Bug#901789: mesa: white screen when running Xfwm4 with compositing

[Yves-Alexis Perez <corsac@debian.org>]

Source: mesa
Version: 18.1.1-1
Severity: important

Hi,

since the upgrade from 18.0.5-1 to 18.1.1-1 of the various mesa
packages, xfwm4 with compositing enabling only display a white screen.
The cursor is shown on top, but no window appears. When restarting xfwm4
I can briefly see the windows, then the white screen.

Disabling compositing in xfwm4 workarounds the problem but then you lose
all compositing-related features.

The platform is a ThinkPad X250 with Intel graphics (HD Graphics 5500 I
thinks, CPU generation is Broadwell)

If you need more information, please ask.

Regards,
-- 
Yves-Alexis


-- System Information:
Debian Release: buster/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (450, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.16.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.utf8, LC_CTYPE=fr_FR.utf8 (charmap=UTF-8), LANGUAGE=fr_FR.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled