CloudCompare fails to launch with error: “QXcbConnection: Could not connect to display :0”
In the last week, CloudCompare has suddenly stopped launching. When trying to launch via desktop icon, nothing happens. When trying to launch via commandline (e.g. $ cloudcompare.CloudCompare) nothing happens and I get the following error:
QXcbConnection: Could not connect to display :0
Aborted (core dumped)
Trying to launch CloudCompare with sudo/as root user returns a slightly different error message:
mkdir: cannot create directory '/run/user/0': Permission denied
QXcbConnection: Could not connect to display :0
Having looked around Github, here and various other forums, this seems to be a problem that people have encountered with other programs that use Qt and/or OpenGL (see 1, 2, 3). I also realise that this isn't really enough information to debug the problem, so if there is any other diagnostic info I can/should provide, let me know and I will add it.
My Environment
OS & Version: Ubuntu 14.04 LTS
CC Version: v2.8.1 (latest)
Graphics card: Intel Haswell Mobile
Qt version: 5.2.1
linux qt
asked Nov 3 '17 at 0:26
MattMatt
112
bumped to the homepage by Community♦ 2 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
In the last week, CloudCompare has suddenly stopped launching. When trying to launch via desktop icon, nothing happens. When trying to launch via commandline (e.g. $ cloudcompare.CloudCompare) nothing happens and I get the following error:
QXcbConnection: Could not connect to display :0
Aborted (core dumped)
Trying to launch CloudCompare with sudo/as root user returns a slightly different error message:
mkdir: cannot create directory '/run/user/0': Permission denied
QXcbConnection: Could not connect to display :0
Having looked around Github, here and various other forums, this seems to be a problem that people have encountered with other programs that use Qt and/or OpenGL (see 1, 2, 3). I also realise that this isn't really enough information to debug the problem, so if there is any other diagnostic info I can/should provide, let me know and I will add it.
My Environment
OS & Version: Ubuntu 14.04 LTS
CC Version: v2.8.1 (latest)
Graphics card: Intel Haswell Mobile
Qt version: 5.2.1
linux qt
asked Nov 3 '17 at 0:26
MattMatt
112
bumped to the homepage by Community♦ 2 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
In the last week, CloudCompare has suddenly stopped launching. When trying to launch via desktop icon, nothing happens. When trying to launch via commandline (e.g. $ cloudcompare.CloudCompare) nothing happens and I get the following error:
QXcbConnection: Could not connect to display :0
Aborted (core dumped)
Trying to launch CloudCompare with sudo/as root user returns a slightly different error message:
mkdir: cannot create directory '/run/user/0': Permission denied
QXcbConnection: Could not connect to display :0
Having looked around Github, here and various other forums, this seems to be a problem that people have encountered with other programs that use Qt and/or OpenGL (see 1, 2, 3). I also realise that this isn't really enough information to debug the problem, so if there is any other diagnostic info I can/should provide, let me know and I will add it.
My Environment
OS & Version: Ubuntu 14.04 LTS
CC Version: v2.8.1 (latest)
Graphics card: Intel Haswell Mobile
Qt version: 5.2.1
linux qt
asked Nov 3 '17 at 0:26
MattMatt
112
In the last week, CloudCompare has suddenly stopped launching. When trying to launch via desktop icon, nothing happens. When trying to launch via commandline (e.g. $ cloudcompare.CloudCompare) nothing happens and I get the following error:
QXcbConnection: Could not connect to display :0
Aborted (core dumped)
Trying to launch CloudCompare with sudo/as root user returns a slightly different error message:
mkdir: cannot create directory '/run/user/0': Permission denied
QXcbConnection: Could not connect to display :0
Having looked around Github, here and various other forums, this seems to be a problem that people have encountered with other programs that use Qt and/or OpenGL (see 1, 2, 3). I also realise that this isn't really enough information to debug the problem, so if there is any other diagnostic info I can/should provide, let me know and I will add it.
My Environment
OS & Version: Ubuntu 14.04 LTS
CC Version: v2.8.1 (latest)
Graphics card: Intel Haswell Mobile
Qt version: 5.2.1
linux qt
linux qt
asked Nov 3 '17 at 0:26
MattMatt
112
asked Nov 3 '17 at 0:26
MattMatt
112
edited Nov 3 '17 at 1:14
Matt
asked Nov 3 '17 at 0:26
MattMatt
112
asked Nov 3 '17 at 0:26
MattMatt
112
asked Nov 3 '17 at 0:26
MattMatt
112
112
bumped to the homepage by Community♦ 2 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 2 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Newer systems by design don't allow graphical applications as root (it's a Wayland thing). Workaround:
$ xhost si:localuser:root
$ sudo ...your-graphical-app...
Restore the default permissions:
$ xhost -si:localuser:root
edited Apr 9 '18 at 3:12
slm♦
254k71535687
answered Apr 8 '18 at 12:07
kubanczykkubanczyk
876514
Many thanks for the answer! I haven't encountered the problem since re-installing CloudCompare, but if it happens again I will certainly try this and report back.
– Matt
Apr 9 '18 at 22:00
add a comment |
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1 Answer
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1 Answer
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active
oldest
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active
oldest
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active
oldest
votes
Newer systems by design don't allow graphical applications as root (it's a Wayland thing). Workaround:
$ xhost si:localuser:root
$ sudo ...your-graphical-app...
Restore the default permissions:
$ xhost -si:localuser:root
edited Apr 9 '18 at 3:12
slm♦
254k71535687
answered Apr 8 '18 at 12:07
kubanczykkubanczyk
876514
Many thanks for the answer! I haven't encountered the problem since re-installing CloudCompare, but if it happens again I will certainly try this and report back.
– Matt
Apr 9 '18 at 22:00
add a comment |
Newer systems by design don't allow graphical applications as root (it's a Wayland thing). Workaround:
$ xhost si:localuser:root
$ sudo ...your-graphical-app...
Restore the default permissions:
$ xhost -si:localuser:root
edited Apr 9 '18 at 3:12
slm♦
254k71535687
answered Apr 8 '18 at 12:07
kubanczykkubanczyk
876514
Many thanks for the answer! I haven't encountered the problem since re-installing CloudCompare, but if it happens again I will certainly try this and report back.
– Matt
Apr 9 '18 at 22:00
add a comment |
Newer systems by design don't allow graphical applications as root (it's a Wayland thing). Workaround:
$ xhost si:localuser:root
$ sudo ...your-graphical-app...
Restore the default permissions:
$ xhost -si:localuser:root
edited Apr 9 '18 at 3:12
slm♦
254k71535687
answered Apr 8 '18 at 12:07
kubanczykkubanczyk
876514
Newer systems by design don't allow graphical applications as root (it's a Wayland thing). Workaround:
$ xhost si:localuser:root
$ sudo ...your-graphical-app...
Restore the default permissions:
$ xhost -si:localuser:root
edited Apr 9 '18 at 3:12
slm♦
254k71535687
answered Apr 8 '18 at 12:07
kubanczykkubanczyk
876514
edited Apr 9 '18 at 3:12
slm♦
254k71535687
edited Apr 9 '18 at 3:12
slm♦
254k71535687
edited Apr 9 '18 at 3:12
slm♦
254k71535687
254k71535687
answered Apr 8 '18 at 12:07
kubanczykkubanczyk
876514
answered Apr 8 '18 at 12:07
kubanczykkubanczyk
876514
answered Apr 8 '18 at 12:07
kubanczykkubanczyk
876514
876514
Many thanks for the answer! I haven't encountered the problem since re-installing CloudCompare, but if it happens again I will certainly try this and report back.
– Matt
Apr 9 '18 at 22:00
add a comment |
Many thanks for the answer! I haven't encountered the problem since re-installing CloudCompare, but if it happens again I will certainly try this and report back.
– Matt
Apr 9 '18 at 22:00
Many thanks for the answer! I haven't encountered the problem since re-installing CloudCompare, but if it happens again I will certainly try this and report back.
– Matt
Apr 9 '18 at 22:00
Many thanks for the answer! I haven't encountered the problem since re-installing CloudCompare, but if it happens again I will certainly try this and report back.
– Matt
Apr 9 '18 at 22:00
add a comment |
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