I forgot to mention that the GDM edit requires a reboot. Either way, double
check that you don't have `nolisten tcp` on the Xorg or Xvnc process.
> pgrep -lf 'nolisten tcp'
Is XAUTHORITY or SHADOW_XAUTHORITY defined? If so, you may need to copy the
cookie around.
Here is some example tcl code:
set hostname [lindex [split [info hostname] .] 0]
set display [lindex [split $env(DISPLAY) :] 1]
# Configure xauth for local machine displays
if {[info exists env(XAUTHORITY)]} {
eval set [array get env XAUTHORITY]
eval set [array get env HOME]
set status [catch {exec xauth -f $XAUTHORITY list :$display} output]
set cookie [lindex [split $output] end]
if {$status == 0 && $cookie != ""} {
catch {exec xauth -f $XAUTHORITY add $hostname:$display
MIT-MAGIC-COOKIE-1 $cookie}
catch {exec xauth -f $HOME/.Xauthority add $hostname:$display
MIT-MAGIC-COOKIE-1 $cookie}
}
}
# Configure xauth for NX displays
if {[info exists env(SHADOW_XAUTHORITY)]} {
eval set [array get env SHADOW_XAUTHORITY]
eval set [array get env HOME]
set status [catch {exec xauth -f $SHADOW_XAUTHORITY list :$display}
output]
set cookie [lindex [split $output] end]
if {$status == 0 && $cookie != ""} {
catch {exec xauth -f $SHADOW_XAUTHORITY add $hostname:$display
MIT-MAGIC-COOKIE-1 $cookie}
catch {exec xauth -f $HOME/.Xauthority add $hostname:$display
MIT-MAGIC-COOKIE-1 $cookie}
}
}
You test this using xhost.
[GOOD]
> xhost
access control enabled, only authorized clients can connect
[BAD]
> xhost
No protocol specified
xhost: unable to open display
-----Original Message-----
From: John_Tai [mailto:[email protected]]
Sent: Wednesday, July 19, 2017 2:32 AM
To: Dobbie, Brad <[email protected]>; [email protected]
Subject: RE: DISPLAY problem in RHEL6.8
I tried this but it didn't help. Maybe because I am using VNC?
I actually did find that VNC might be the problem.
RHEL5 uses vnc4.
RHEL6.8 uses tigervnc1.1
I tried to install vnc4 in RHEL6.8 and it solved the problem. Though I'm sure
there is a config somewhere that I can simply tweak. Anybody have any idea?
I realize I'm pushing my luck here, since it looks like it's not related to
SGE. Thank you anyway to all who replied.
-----Original Message-----
From: Dobbie, Brad [mailto:[email protected]]
Sent: Tuesday, July 18, 2017 9:39
To: John_Tai; [email protected]
Subject: RE: DISPLAY problem in RHEL6.8
We recently hit this issue in RHEL6. We needed to make a change to
/etc/gdm/custom.conf to prevent the '-nolisten tcp' option on X.
--- /etc/gdm/custom.conf.orig 2013-11-21 17:05:17.000000000 -0500
+++ /etc/gdm/custom.conf 2017-07-06 14:37:50.804997614 -0400
@@ -3,6 +3,7 @@
[daemon]
[security]
+DisallowTCP=false
[xdmcp]
Hope this helps,
Brad
From: [email protected] [mailto:[email protected]] On
Behalf Of John_Tai
Sent: Tuesday, July 18, 2017 5:23 AM
To: [email protected]
Subject: [gridengine users] DISPLAY problem in RHEL6.8
I'm having a DISPLAY issue in RHEL6.8 that I don't have in RHEL5. I am using
SGE6.2u6
I use VNC to connect to a linux server. By default the DISPLAY is set to :4.0
and I can start GUI jobs locally:
# echo $DISPLAY
:4.0
# xclock
However if I submit a GUI job it gives me a display error:
# qrsh -V -b y -cwd -now n -q mailto:test.q@ibm065 xclock
Error: Can't open display: :4.0
At this point I set the display by adding the hostname and I can successfully
submit the job:
# setenv DISPLAY `hostname`:4.0
# echo $DISPLAY
ibm041:4.0
# qrsh -V -b y -cwd -now n -q mailto:test.q@ibm065 xclock
At least, it is successful in RHEL5.
However in RHEL6.8 setting the display with hostname doesn't allow GUi jobs to
start either locally or remotely:
# setenv DISPLAY ibm046:4.0
# xclock
Error: Can't open display: ibm046:4.0
# setenv DISPLAY ibm046:4.0
# qrsh -V -b y -cwd -now n -j y -q mailto:test.q@ibm065 xclock
Error: Can't open display: ibm046:4.0
Hopefully somebody has experienced it before.
Thanks
John
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