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 730729 - Xinerama doesn't work
Summary: Xinerama doesn't work
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: xorg-x11-drv-qxl
Version: 6.2
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Søren Sandmann Pedersen
QA Contact: SPICE QE bug list
URL:
Whiteboard:
Depends On:
Blocks: 732423 732467 750568
TreeView+ depends on / blocked
 
Reported: 2011-08-15 14:33 UTC by Søren Sandmann Pedersen
Modified: 2014-06-18 09:14 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 732423 732467 (view as bug list)
Environment:
Last Closed: 2011-12-06 15:08:42 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
xorg.conf file with a Xinerama setup (1.25 KB, text/plain)
2011-08-22 15:09 UTC, Søren Sandmann Pedersen 		no flags Details
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHEA-2011:1621 0 normal SHIPPED_LIVE xorg-x11-drv-qxl bug fix and enhancement update 2011-12-06 00:50:59 UTC

Description Søren Sandmann Pedersen 2011-08-15 14:33:39 UTC 
Xinerama does not work on 6.2. This may be a bug in xorg-x11-drv-qxl, in qemu, or in spice-server.
Comment 2 Søren Sandmann Pedersen 2011-08-19 14:41:01 UTC 
Some initial investigation:

  - The spice client crashes when the server first asks for four screens. 
    Starting spicec again makes it display the four windows and run without
    crashing.

  - There are two relatively straightforward fixes to the X driver, both having
    to do with the extra devices not emulating VGA.

         - The PCI probing skips non-VGA devices

         - The "save state" routine saves the state of the VGA fonts. When 
           that is called for non-VGA hardware it gets applied to the one
           VGA device, putting it into VGA mode which then creates chaos.

   - With those fixes, the X server will start in Xinerama mode, but there is
     something wrong with the tablet; it seems to be stuck on the third screen.

     Running without the tablet then seems to work.
Comment 3 Søren Sandmann Pedersen 2011-08-22 15:00:12 UTC 
RHEL-6:xorg-x11-drv-qxl-0_0_14-5_el6)
Comment 5 Søren Sandmann Pedersen 2011-08-22 15:09:44 UTC 
Created attachment 519304 [details]
xorg.conf file with a Xinerama setup

QA, I'll attach an xorg.conf file that works for me, although it may be that you will need to adjust the PCI IDs according according to how your specific VM is set up. You can find the devices by doing

    lspci -v 

as root and looking for QXL devices.
Comment 7 errata-xmlrpc 2011-12-06 15:08:42 UTC 
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.

http://rhn.redhat.com/errata/RHEA-2011-1621.html
Note You need to log in before you can comment on or make changes to this bug.