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Description of problem:
xvfb-run no longer appears to work.
Version-Release number of selected component (if applicable):
1.19.3
How reproducible:
Try to run:
xvfb-run -d echo hi
and under 1.19.3 this command hangs.
Steps to Reproduce:
1. Upgrade to 1.19.3 of the xorg-x11-server-Xvfb package
2. Test by running "xvfb-run -d echo hi"
3.
Actual results:
Script hangs.
Expected results:
"hi" is output by the test script.
Additional info:
Breaks all of our headless browser testing.
Ref: RHEL support case 01908600
Created attachment 1345262[details]
strace of xvfb-run -d "echo hi"
This is an strace showing behavior.
Note: sits at read forever, so stopped by Ctrl-C
I am also experiencing this issue, in xorg-x11-server-Xvfb-1.17.2-22 the -d flag works, however in xorg-x11-server-Xvfb-1.19.3-11 it hangs indefinitely.
We are also experiencing this issue with Xvfb 1.19, but accidentally found that if we use the *deprecated* -a option, instead of -d, it works:
This works:
# xvfb-run -a -e Xvfb.out ls
<output from ls>
This does not:
# xvfb-run -a -e Xvfb.out ls
<hangs forever>
And this is in the error file:
# cat Xvfb.out
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
Something broke the -d option's ability to find the next free display, while the -a option which uses the older find_free_servernum() still works.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2018:0736