X2Go Bug report logs - #1579
x2Goclient crashes with error "Can't start X.org Server. Please check your installation"

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Message #5 received at submit@bugs.x2go.org (full text, mbox, reply):

From: "Peter Geelen (Quest For Security)" <peter@questforsecurity.be>

To: "submit@bugs.x2go.org" <submit@bugs.x2go.org>

Subject: x2Goclient crashes with error "Can't start X.org Server. Please check your installation"

Date: Thu, 13 Jan 2022 16:16:12 +0000

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Package: X2goclient
Version: 4.1.2.2.-2020-02-13

Operating system
Windows 10 version 2005 (OS build 19041.1415)

Issue
The x2go client worked the last few days.
Suddenly I could not start the app anymore and it crashes with an error

"Can't start X.org Server.
Please check your installation"


Error Screenshot
[cid:image003.png@01D808A0.42DDC790]


Error message
"Can't start X.org Server.
Please check your installation"


I can't even disable the error, as soon as the error is displayed, the application crashes.
[cid:image002.png@01D808A0.42DDC790]

Troubleshooting/analysis

Possibly a Windows update crashed the application, but I cannot find any proof or logging what exactly is crashing.

Eventviewer:

EventID 0
The following information was included with the event:

sshd: PID 14632: error: Bind to port 7022 on :: failed: Operation not permitted.

The request is not supported

And also

The following information was included with the event:

sshd: PID 14632: fatal: Cannot bind any address.

The request is not supported





Kind regards,
Peter GEELEN

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Message #10 received at 1579@bugs.x2go.org (full text, mbox, reply):

From: "Peter Geelen (Quest For Security)" <peter@questforsecurity.be>

To: "1579@bugs.x2go.org" <1579@bugs.x2go.org>

Subject: RE: Bug#1579: Acknowledgement (x2Goclient crashes with error "Can't start X.org Server. Please check your installation")

Date: Sat, 15 Jan 2022 18:13:51 +0000

After uninstallation of the X2Go Client, it looks like there are some leftovers on disk and the registry that corrupt or cripple the re-installation.

You can reinstall, after manually removing
- X2Go files (including session config and vcxsrv files) from from the user profile folder
- X2GO file references (to the installation and user folder) from the registry

Then it looks like the X2GO client can be reinstalled and reconnect to the remote sessions without issue.
Just to be clear, as the sessions are removed, they have to be reconfigured.

Kind regards,
Peter

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