Red Hat Bugzilla – Bug 982452
Gnome with F19 "thinks" it sees 2 monitors with a KVM over IP switch, but only one monitor exists
Last modified: 2015-02-17 11:00:13 EST
Description of problem:
Gnome 3.8.1 (I think this is the version) that comes with Fedora 19 "thinks" my KVM switch has 2 monitors when I only have one monitor.
Version-Release number of selected component (if applicable):
Fedora 19 and Gnome that ships with F19. 3.8.1?
Steps to Reproduce:
1. Install F19 as an infrastructure server.
2. Logon and yum groupinstall the Gnome Desktop and dependencies.
4. Wait forever for an "Activities" menu that will never show up.
Gnome "thinks" you have a continuous display spanning 2 monitors. But you only have one monitor and the system you're installing has no provision for a second monitor. When you log on, you will see pretty much just a background pattern, not realizing you're somehow fooled Gnome into "thinking" this is the 2nd desktop portion of a continuous dual monitor display. You wait an insanely long time for the "Activity" menu to present itself and after the screen sits there like a bump on a log for a long time, you'll start clicking around. Eventually you'll stumble across an unmarked area at the top left of the screen, near where the "Activity" menu should be.. Right-click and that takes you to a menu where you can adjust the display. It will insist you have 2 monitors, even though you only have one monitor. Clicking the choice to replicate both displays works around the problem - now you have an "Activity" menu.
Gnome should provide a coupon for a free real, actual first monitor since it thinks my monitor is the 2nd monitor in a dual monitor system. If the economics for that choice don't work, Gnome really should only find one monitor when only one monitor is present. Invisible mystery-monitors are very difficult to track down.
The KVM switch hardware that produced the problem is an Avocent DSR2020 KVM over IP switch with DSRIQ-USB dongle. The DSRIQ-USB dongle has a cat5 port on one side and USB/Video cables on the other side. These retail for $100+ but are now widely available on eBay for pennies on the dollar. The DSRIQ moves USB and video data to/from the KVM switch via standard cat5e cable and connects USB and video cables to the managed server. I only have one monitor and the F19 system I am installing only has one monitor port. I have a hunch Gnome mistakenly thinks that DSRIQ-USB dongle is a first monitor and my real monitor is a 2nd monitor.
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