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[GH-ISSUE #6911] playonlinux: Cannot start application: Permission denied #3417
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Reference: github-starred/firejail#3417
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Originally created by @davew-fj on GitHub (Sep 26, 2025).
Original GitHub issue: https://github.com/netblue30/firejail/issues/6911
Description
playonlinux: Cannot start application in firejail. Permission denied.
Steps to Reproduce
Steps to reproduce the behavior
Run in bash
LC_ALL=C firejail playonlinuxSee error `Permission denied'
Run in bash
LC_ALL=C firejail /usr/bin/playonlinuxSee error 'No such file or directory'
This Path was identified by 'which' query. Note: This is a symlink which leads to the following 'exec' path:
Run in bash
LC_ALL=C firejail /usr/share/playonlinux/playonlinuxSee error 'No such file or directory'
Expected behavior
PlayOnLinux GUI should open, to allow installation and operation of programs.
Actual behavior
Error messages received (as noted above). 'Parent is shutting down, bye...'
Behavior without a profile
What changed calling
LC_ALL=C firejail --noprofile /path/to/programin aterminal? The program comes up and functions normally (with all of the above paths to program).
Additional context
_NOTE: The behavior described in this first post was affected by "playonlinux.local" in which I had experimentally whitelisted several directories, as follows: (I will attempt to add a second post, showing results without playonlinux.local)
Environment
uname -srm):Tried 2 kernels. The problem is the same with either:
Linux 5.10.224-antix.1-amd64.smp
Linux 6.1.105-antix.1-amd64.smp
PlayOnLinux 4.3.4
was compiled (
git rev-parse HEAD): Not applicableChecklist
/usr/bin/vlc) "fixes" it).https://github.com/netblue30/firejail/issues/1139)browser-allow-drm yes/browser-disable-u2f noinfirejail.configto allow DRM/U2F in browsers.--profile=PROFILENAMEto set the right profile. (Only relevant for AppImages)Log
Output of
LC_ALL=C firejail /path/to/programOutput of
LC_ALL=C firejail --debug /path/to/program@davew-fj commented on GitHub (Sep 26, 2025):
As noted in my edited post above, I accidentally reported the issue with "playonlinux.local" active. See "Additional context" section in above post. Here is what happens without "playonlinux.local".
Description
playonlinux: Cannot start application in firejail. "Playonlinux cannot find nc (NetCat). You need to install it to continue."
Steps to Reproduce
Steps to reproduce the behavior
LC_ALL=C firejail playonlinuxExpected behavior
PlayOnLinux GUI should open, to allow installation and operation of programs.
Actual behavior
Error message received (as noted above).
After clicking okay in Error text box, terminal reports: 'Parent is shutting down, bye...'
Behavior without a profile
What changed calling
LC_ALL=C firejail --noprofile playonlinuxin aterminal? The program comes up and functions normally.
Additional context
This is the behavior without an active "playonlinux.local" file.
See the "Additional Context" section of my first post.
Environment
uname -srm):Tried 2 kernels. The problem is the same with either:
Linux 5.10.224-antix.1-amd64.smp
Linux 6.1.105-antix.1-amd64.smp
PlayOnLinux 4.3.4
was compiled (
git rev-parse HEAD): Not applicableChecklist
/usr/bin/vlc) "fixes" it).https://github.com/netblue30/firejail/issues/1139)browser-allow-drm yes/browser-disable-u2f noinfirejail.configto allow DRM/U2F in browsers.--profile=PROFILENAMEto set the right profile. (Only relevant for AppImages)Log
Output of
LC_ALL=C firejail /path/to/programOutput of
LC_ALL=C firejail --debug /path/to/program@netblue30 commented on GitHub (Feb 3, 2026):
We should add support for it. Similar to dosbox, python, GPLv3: https://github.com/PlayOnLinux/POL-POM-4
@kmk3 commented on GitHub (Feb 10, 2026):
Note that we do not maintain that version of firejail:
Versions other than the latest usually have outdated profiles and may contain
bugs and security vulnerabilities that were fixed in later versions.
See also:
What happens with the latest released version?