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Invisible windows in VirtualBox


Description Daniel Ruiz de Alegría 2019-12-13 10:59:35 CET
Created attachment 9306 
Xfwm shows invisible windows

Many people are reporting not being able to use their desktop as xfwm4 is showing completely transparent windows, usually only drawing the shadow frame. This issue appears using Virtualbox over a Windows Host, having 3D acceleration enabled and guest-additions installed. Testing it on a Linux Host, windows showed correctly, but some glitches appear in the form of fast blinking.

In both cases disabling 3D acceleration solves it. But other tested compositors like Compton don't show this behavior.

This has been tested on Kali Linux 2019.4 and Xubuntu 19.10, using xfwm4 4.14. But the issue was introduced in version 4.13.0 as 4.12.0 works fine.

Compiling it from source showed that the change that introduced this bug is 'compositor: Add support for GLX' https://git.xfce.org/xfce/xfwm4/commit/?id=fee08eafa751a153ff93b04152ea66334141cac5
Comment 1 Olivier Fourdan editbugs 2019-12-13 11:50:04 CET
Can you please post the output of "glxinfo" on that /hardware/ ?
Comment 2 Daniel Ruiz de Alegría 2019-12-13 13:55:36 CET
"glxinfo" output: https://pastebin.com/raw/41GtYmkT
Comment 3 Olivier Fourdan editbugs 2019-12-13 18:31:03 CET
(In reply to Daniel Ruiz de Alegría from comment #2)
> "glxinfo" output: https://pastebin.com/raw/41GtYmkT

Thanks. Next time, please make sure to attach  the relevant information to the bug itself rather than an external web site such as pastebin who will erase the data after a short while.

Meanwhile, I'm copying the relevant part here:

Extended renderer info (GLX_MESA_query_renderer):
    Vendor: VMware, Inc. (0x15ad)
    Device: SVGA3D; build: RELEASE;  LLVM; (0x405)
    Version: 19.2.3
    Accelerated: no
    Video memory: 1MB
    Unified memory: no
    Preferred profile: compat (0x2)
    Max core profile version: 0.0
    Max compat profile version: 2.1
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 2.0
OpenGL vendor string: VMware, Inc.
OpenGL renderer string: SVGA3D; build: RELEASE;  LLVM;
OpenGL version string: 2.1 Mesa 19.2.3

I'll probably blacklist that renderer for the GLX vblank.
Comment 4 Daniel Ruiz de Alegría 2019-12-13 19:46:30 CET
I wasn't sure how much information could be relevant and didn't want to bloat this page.

By the way, I just tested the new Virtualbox release (6.1) and now windows are visible, even using Windows as the host OS. Now it only shows the same little glitches as using a Linux host.

Could this be VirtualBox's fault?
Comment 5 Git Bot editbugs 2020-04-05 17:53:35 CEST
Olivier Fourdan referenced this bugreport in commit 53bf7bab95f17897d5282de094888ef63696451b

compositor: Blacklist SVGA3D renderer

Comment 6 Git Bot editbugs 2020-04-11 17:59:11 CEST
Olivier Fourdan referenced this bugreport in commit e0391a3dbac510af13c6df3438b0bfd9ee01dfa8

compositor: Blacklist SVGA3D renderer

Comment 7 Git Bot editbugs 2020-05-29 12:32:31 CEST
-- GitLab Migration Automatic Message --

This bug has been migrated to xfce.org's GitLab instance and has been closed from further activity.

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Bug #16274

Reported by:
Daniel Ruiz de Alegría
Reported on: 2019-12-13
Last modified on: 2020-05-29


Olivier Fourdan
CC List:
1 user




Xfwm shows invisible windows (230.58 KB, image/png)
2019-12-13 10:59 CET , Daniel Ruiz de Alegría
no flags

Additional information