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[GH-ISSUE #640] Grafics acceleration with --x11=xpra #443

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opened 2026-05-05 05:52:28 -06:00 by gitea-mirror · 6 comments

gitea-mirror commented

2026-05-05 05:52:28 -06:00

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Originally created by @fkarl423 on GitHub (Jul 19, 2016).
Original GitHub issue: https://github.com/netblue30/firejail/issues/640

When running firefox with x11 sandboxing using xpra, the hardware acceleration seems broken.

It seems like the application is using VMware grafics drivers instead of the native one.

about:support shows that with xpra it says
Adapter Description: VMware, Inc. -- Gallium 0.4 on llvmpipe (LLVM 3.8, 256 bits)
without it:
Adapter Description: nouveau -- Gallium 0.4 on NVE4

Like this it is barely useable.
Is there a way to change the used grafics driver in xpra?
I would suggest to atomatically set this bz firejail to make it useable on low end hardware.

Originally created by @fkarl423 on GitHub (Jul 19, 2016). Original GitHub issue: https://github.com/netblue30/firejail/issues/640 When running firefox with x11 sandboxing using xpra, the hardware acceleration seems broken. It seems like the application is using VMware grafics drivers instead of the native one. about:support shows that with xpra it says Adapter Description: VMware, Inc. -- Gallium 0.4 on llvmpipe (LLVM 3.8, 256 bits) without it: Adapter Description: nouveau -- Gallium 0.4 on NVE4 Like this it is barely useable. Is there a way to change the used grafics driver in xpra? I would suggest to atomatically set this bz firejail to make it useable on low end hardware.

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label 2026-05-05 05:52:28 -06:00

gitea-mirror commented

2026-05-05 05:52:32 -06:00

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@netblue30 commented on GitHub (Jul 20, 2016):

Unfortunately there is no 3D acceleration support in xpra. They have a setting in /etc/xpra/xpra.conf (opengl = auto) but this one picks up the software implementation (llvmpipe). It will work fine for browsing and text editing on powerful computers, but that's about it - definitely not good for games.

@netblue30 commented on GitHub (Jul 20, 2016): Unfortunately there is no 3D acceleration support in xpra. They have a setting in /etc/xpra/xpra.conf (opengl = auto) but this one picks up the software implementation (llvmpipe). It will work fine for browsing and text editing on powerful computers, but that's about it - definitely not good for games.

gitea-mirror commented

2026-05-05 05:52:34 -06:00

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@msva commented on GitHub (Jul 28, 2016):

@netblue30 actually, not only 3d but also 2d acceleration.
And, yes I've same with chrome-based apps like slack. When they tries to use acceleration there are rendering artefacts appearing.

@msva commented on GitHub (Jul 28, 2016): @netblue30 actually, not only 3d but also 2d acceleration. And, yes I've same with chrome-based apps like slack. When they tries to use acceleration there are rendering artefacts appearing.

gitea-mirror commented

2026-05-05 05:52:36 -06:00

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@l29ah commented on GitHub (Aug 8, 2016):

I've tried to use virtualgl with firejail with --x11=xpra: seems working for glxgears, but firefox renders a gray rectangle that can be closed with Enter (an "already running" message box?) and that's it.

@l29ah commented on GitHub (Aug 8, 2016): I've tried to use virtualgl with firejail with --x11=xpra: seems working for glxgears, but firefox renders a gray rectangle that can be closed with Enter (an "already running" message box?) and that's it.

gitea-mirror commented

2026-05-05 05:52:38 -06:00

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@netblue30 commented on GitHub (Aug 9, 2016):

I'll try virtualgl, maybe it can solve the problem.

@netblue30 commented on GitHub (Aug 9, 2016): I'll try virtualgl, maybe it can solve the problem.

gitea-mirror commented

2026-05-05 05:52:40 -06:00

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@chiraag-nataraj commented on GitHub (Oct 3, 2018):

@netblue30, did you ever try virtualgl?

@chiraag-nataraj commented on GitHub (Oct 3, 2018): @netblue30, did you ever try virtualgl?

gitea-mirror commented

2026-05-05 05:52:42 -06:00

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@totaam commented on GitHub (Jul 20, 2019):

There is some confusion here.
The opengl switch is used mostly by the xpra client to enable opengl accelerated rendering.
On the server, it is only used for querying the adapter (with v3, use "noprobe" to skip this).
If you want to enable accelerated rendering on the server, start your client applications using virtualgl.
More info here: Xpra OpenGL
This will mean opening up an X11 channel from the container back to the host for VirtualGL, but this is still much safer than allowing client applications to talk to X11 directly. At the end of the day, real acceleration requires access to the hardware...

@totaam commented on GitHub (Jul 20, 2019): There is some confusion here. The _opengl_ switch is used mostly by the xpra client to enable opengl accelerated rendering. On the server, it is only used for querying the adapter (with v3, use "noprobe" to skip this). If you want to enable accelerated rendering on the server, start your client applications using virtualgl. More info here: [Xpra OpenGL](https://xpra.org/trac/wiki/Usage/OpenGL) This will mean opening up an X11 channel from the container back to the host for VirtualGL, but this is still much safer than allowing client applications to talk to X11 directly. At the end of the day, real acceleration requires access to the hardware...

gitea-mirror referenced this issue

2026-05-05 10:04:52 -06:00

[PR #443] [MERGED] Use "~" in package name #3624

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Reference: github-starred/firejail#443

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