Bug 6192 - Installer/setup hangs without any window with restricted X server (e.g. Xwayland)
Summary: Installer/setup hangs without any window with restricted X server (e.g. Xwayl...
Alias: None
Product: ThinLinc
Classification: Unclassified
Component: Server Installer (show other bugs)
Version: trunk
Hardware: PC Unknown
: P2 Normal
Target Milestone: 4.10.1
Assignee: Pierre Ossman
Keywords: relnotes, samuel_tester
Depends on:
Blocks: 7358 7328
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Reported: 2017-03-14 16:40 CET by Henrik Andersson
Modified: 2019-07-09 11:48 CEST (History)
3 users (show)

See Also:
Acceptance Criteria:


Description Henrik Andersson cendio 2017-03-14 16:40:44 CET
When running the installer one is asked to enter password for sudo graphically. After authentication no more graphical dialogs are shown. The tlinstaller process is still running and a strace shows hang on 'read(0,'.

Both seen on Samuels and Henriks desktops and we are running wayland. No XAUTHORITY in environment and after running 'xhost +' the problem is solved.
Comment 1 Samuel Mannehed cendio 2017-03-14 16:49:26 CET
This is what the terminal says:

> $ sudo ./install-server
> [sudo] password for samuel: 
> No protocol specified
> /usr/lib64/python2.7/site-packages/gtk-2.0/gtk/__init__.py:57: GtkWarning: could not open display
>   warnings.warn(str(e), _gtk.Warning)
> No protocol specified
> Could not start PyGTK. Using text mode fallback...
Comment 2 Aaron Sowry cendio 2017-03-21 09:44:16 CET
https://bugzilla.redhat.com/show_bug.cgi?id=1274451 ..?
Comment 3 Pierre Ossman cendio 2017-03-21 10:29:53 CET
Fun. I guess it is time for another rewrite of tl-setup then. :)
Comment 4 Pierre Ossman cendio 2017-03-21 13:25:34 CET
(In reply to comment #2)
> https://bugzilla.redhat.com/show_bug.cgi?id=1274451 ..?

The short summary is that running graphical applications as root is now forbidden. The suggested approach is some front-end/back-end solution, ideally using PolicyKit.
Comment 5 Pierre Ossman cendio 2017-03-21 13:37:34 CET
We'll do a platform specific note before release with a suggested workaround.

Then we'll move this bug to Next for finding an automatic workaround that forces text mode.

After that we'll have to have a new discussion on where to go from there and when.
Comment 6 Karl Mikaelsson cendio 2017-03-29 10:59:23 CEST
Platform specific note added. Moving to Next.

(Note to self: fix list of bugs in release notes.)
Comment 7 Samuel Mannehed cendio 2017-04-06 14:45:01 CEST
Platform Specific Note looks good, workaround works.
Comment 8 Pierre Ossman cendio 2019-05-15 12:45:00 CEST
This also affects RHEL now as they also have Wayland by default.
Comment 9 Pierre Ossman cendio 2019-06-26 12:00:04 CEST
This blog post claims they have backtracked a bit and are working on allowing root process access to Xwayland at least:

Comment 10 Pierre Ossman cendio 2019-07-02 10:20:54 CEST
This issue is more general than just Wayland. The issue is that Xwayland is configured in a very restrictive way, something that is fully possible with any modern X server. So we should detect and work around that, not do anything Wayland specific.

This bug is also about getting something working (e.g. text mode) and not getting full functionality. Bug 7358 has been created to fix this fully.
Comment 12 Pierre Ossman cendio 2019-07-02 15:14:57 CEST
We're now properly falling back to text mode when we cannot find an xauth cookie. That should hopefully map nicely to the cases we're having problems with.
Comment 13 Samuel Mannehed cendio 2019-07-09 11:48:12 CEST
Works well, release note looks good.

Verified the problem when running "tl-4.10.0-server/install-server" (Note: without 'sudo') and verified the fix when running "nightly/server-bundle/install-server". Tested on Fedora 30 with Wayland.
Comment 14 Samuel Mannehed cendio 2019-07-09 11:48:49 CEST
We have to remember to remove the Platform Specific Note on release as well.

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