X2Go Bug report logs - #48
heuler x2gothinclient multihead support breaks singlehead mode

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Package: x2gothinclient; Maintainer for x2gothinclient is X2Go Developers <x2go-dev@lists.x2go.org>; Source for x2gothinclient is src:x2gothinclient.

Reported by: Stefan Baur <newsgroups.mail2@stefanbaur.de>

Date: Fri, 12 Oct 2012 23:03:02 UTC

Severity: important

Tags: pending

Found in version 1.0.99.1

Fixed in version 1.1.0.0

Done: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Bug is archived. No further changes may be made.

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From: Stefan Baur <newsgroups.mail2@stefanbaur.de>
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Subject: heuler x2gothinclient multihead support breaks singlehead mode
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Package: x2gothinclient
Version: 1.0.99.1
Severity: important

/usr/sbin/x2gothinclientd hangs and does not start x2goclient.
The hang is caused by

DISPLAY=:0 LANG=C xrandr | grep ' connected ' | cut -d ' ' -f1

which, when run manually from the command line, gives

"xrandr: Failed to get size of gamma for output default
default" [sic!]

Disabling the entire routine with

-foreach (`DISPLAY=:0 LANG=C xrandr | grep ' connected ' | cut -d ' ' -f1`)
+foreach('')

fixes the issue for singlehead mode, but breaks multihead mode.

So, two suggestions:
1) STDERR from xrandr  should go to /dev/null or to a log file/syslog, so
-foreach (`DISPLAY=:0 LANG=C xrandr | grep ' connected ' | cut -d ' ' -f1`)
+foreach (`DISPLAY=:0 LANG=C xrandr 2>/dev/null | grep ' connected ' | 
cut -d ' ' -f1`)

2) A simple fix could be
if (1 < `DISPLAY=:0 LANG=C xrandr | grep ' connected ' | wc -l`)
{
    foreach (`DISPLAY=:0 LANG=C xrandr | grep ' connected ' | cut -d ' 
' -f1`)
    {
    ...
    }
}
I'm sure there might be a more elegant solution that works within the 
foreach loop, but "Hanc marginis exiguitas non caperet."

-Stefan

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