RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Bug 596303 - X Server hangs after logging into gnome with particular user
Summary: X Server hangs after logging into gnome with particular user
Keywords:
Status: CLOSED DUPLICATE of bug 577959
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: xorg-x11-drv-intel
Version: 6.0
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Adam Jackson
QA Contact: desktop-bugs@redhat.com
URL:
Whiteboard: card_GM45
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-05-26 14:50 UTC by David Kutálek
Modified: 2010-06-11 06:36 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2010-06-11 06:36:00 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
Randr configuration file causing hangs (2.22 KB, application/xml)
2010-05-26 14:50 UTC, David Kutálek 		no flags Details
lspci -vv output (16.18 KB, text/plain)
2010-05-26 14:58 UTC, David Kutálek 		no flags Details
Relevant part of /var/log/messages (3.43 KB, text/plain)
2010-05-26 14:59 UTC, David Kutálek 		no flags Details
Xorg logs (16.41 KB, application/x-gzip)
2010-05-26 15:00 UTC, David Kutálek 		no flags Details
View All

Description David Kutálek 2010-05-26 14:50:39 UTC 
Created attachment 416865 [details]
Randr configuration file causing hangs

Description of problem:

I am using RHEL6 on laptop in docking station with external monitor.

Today after opening of partially closed laptop (still in docking station, with monitor attached to docking station, not sleeping - being in screensaver and waiting for password) strange thing happened. Position of laptop-screen to monitor-screen swapped - from laptop left and monitor right to vice versa.

So I entered password to screensaver and click gnome-display-settings applet to change it back. There was some warning telling me there is a probem with monitor settings (I am sorry for not having screenshot). Anyway, I switched position back and - X server hanged.

After logging via ssh and doing reboot -f (shutdown -r now did not work), this hang repeatedly happens every time I log into Gnome with same user. With new user it does not happen.

I tracked the problem down to ~/.config/monitors.xml (and monitors.xml.backup).
Without these files, logging for this particular user works again. Putting these files back makes the problem appear again. I will attach these.

Also, there are such errors in messages:
kernel: INFO: task i915:152 blocked for more than 120 seconds.
kernel: INFO: task Xorg:2641 blocked for more than 120 seconds.
(see attachments for full error messages)

So it seems some situation caused gnome-display-settings to generate possibly invalid configuration, libgnomedesktop RRandr code tries to apply it and Xorg server hangs.

Version-Release number of selected component (if applicable):

gnome-desktop-2.28.2-6.el6.x86_64
xorg-x11-server-Xorg-1.7.6-5.el6.x86_64
xorg-x11-drv-intel-2.11.0-4.el6.x86_64
libXrandr-1.3.0-4.el6.x86_64

How reproducible:

Always on my desktop when using attached monitors.xml

Steps to Reproduce:
1. useradd -m testuser
2. put monitors.xml into /home/testuser/.config/ (owner testuser)
3. try to log in via gdm as this testuser
  
Actual results:

X server hangs, computer gets unusable locally.
Ssh access is possible, but Xorg cannot be killed and even shutdown -r does not work (reboot -f works).

Expected results:

No hangs! Perhaps a warning or sanitization if monitors.xml is really broken.
And if it is broken, it would be nice to find out why it was crippled by gnome-display-settings applet.

Additional info:

RandR code in libgnomedesktop is responsible for handling monitors.xml. It is nicely documented: http://live.gnome.org/RandR
Comment 1 David Kutálek 2010-05-26 14:58:41 UTC 
Created attachment 416866 [details]
lspci -vv output
Comment 2 David Kutálek 2010-05-26 14:59:25 UTC 
Created attachment 416869 [details]
Relevant part of /var/log/messages
Comment 3 David Kutálek 2010-05-26 15:00:34 UTC 
Created attachment 416871 [details]
Xorg logs

Unfortunately, I am not sure which log file is the one from hang - so I bundled all available.
Comment 5 Ray Strode [halfline] 2010-05-26 18:28:16 UTC 
of course using the randr apis shouldn't cause a hang and kernel backtraces.
Comment 6 RHEL Program Management 2010-06-07 16:22:25 UTC 
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
inclusion.
Comment 7 Adam Jackson 2010-06-07 19:20:51 UTC 
Please try to reproduce with kernel-2.6.32-33.el6 or later.
Comment 8 David Kutálek 2010-06-10 07:39:57 UTC 
I was not able to reproduce using kernel 2.6.32-33.el6.x86_64.

David
Comment 9 Dave Airlie 2010-06-11 06:36:00 UTC 
This should be fixed by the X -nr bug fixed in 2.6.32-33. marking as duplicate of that bug.

*** This bug has been marked as a duplicate of bug 577959 ***
Note You need to log in before you can comment on or make changes to this bug.