Filed from caserun (https://tcms.engineering.redhat.com/run/274904/#caserun_11913768)
This is a successor to https://bugzilla.redhat.com/show_bug.cgi?id=1227730 - no more than 2 monitors are supported on this HW but there are some more subtle problems.
Version-Release number of selected component (if applicable):
package xorg-x11-ODdrv-ati is not installed
package linux-firmware is not installed
package mesa is not installed
package xorg-x11-glamor is not installed
Steps to Reproduce:
1. Connect as many displays as you can to the available ports on your display
2. Ensure the 'nomodeset' kernel parameters are not set in your bootloader
3. Ensure the file /etc/X11/xorg.conf does not exist, or is a valid file that
uses the valid driver.
1. Verify that the graphical environment starts correctly and is spanned
across all connected displays
2. Open a console and run the command xrandr. Take a copy of the results.
3. Disconnect and then re-connect one or more displays; do this several times.
If you are using a docking station for a laptop, try removing the laptop
from and restoring the laptop to it several times.
4. Run your gnome-display-properties. Verify that it correctly shows each of
the connected displays (monitors). Test re-arranging, enabling, disabling
and configuring displays.
A few issues with multimonitor:
1. RHGB only shows up on one display during boot, this is different from most HW.
2. If the login graphical session is set to mirror screens, and either VGA+DP or VGA+DVI are plugged in on boot VGA will not come on until xrandr is invoked.
3. Hotplugging is mostly absent.
4. When adapting the DP output to DVI or HDMI, it will never come on, and xrandr shows a limited list of modes for that monitor.
5. In the DP+VGA configuration DP is off on boot when mirrored, but comes on when VGA is replugged.
Both X and the graphical environment should cope smoothly with displays being
disconnected and reconnected while the system is running: the displays should
be correctly added or removed by X, and the graphical environment should
correctly adjust itself to the added or removed display
Configuration tools should allow you to arrange the displays in any
configuration, enable and disable displays, and change each display's settings;
these changes should work and be reflected in what each display actually shows
Red Hat Enterprise Linux 6 is in the Production 3 Phase. During the Production 3 Phase, Critical impact Security Advisories (RHSAs) and selected Urgent Priority Bug Fix Advisories (RHBAs) may be released as they become available.
The official life cycle policy can be reviewed here:
This issue does not meet the inclusion criteria for the Production 3 Phase and will be marked as CLOSED/WONTFIX. If this remains a critical requirement, please contact Red Hat Customer Support to request a re-evaluation of the issue, citing a clear business justification. Note that a strong business justification will be required for re-evaluation. Red Hat Customer Support can be contacted via the Red Hat Customer Portal at the following URL: