Red Hat Bugzilla – Bug 214539
Under Xen paravirt framebuffer, gnome-display-properties shows bogus refresh rate
Last modified: 2008-02-26 18:40:12 EST
Description of problem:
When the GNOME app for adjusting display resolution is used within a Xen
paravirtualized guest, the refresh rate is reported as -7203 HZ which is rather
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Created a Xen paravirtualized guest running FC6
2. Open virt-manager
3. Connect to the guest console
4. Login to X in the guest
5. Run System -> preferences -> resolution menu
Refresh rate is -7203 HZ
Refresh rate is 0 HZ ? or disabled altogether ?
Since this is a virtual framebuffer with no real display attached, the whole
question of refresh rate is rather irrelevant. So if there is a sensible way to
detect this, I think it'd make sense to either disable the refresh rate widget,
or fix it at zero.
Created attachment 140620 [details]
Screenshot of guest console
It looks like xrandr also reports the wrong refresh rate (see screenshot), so
quite possibly this bug component needs to be changed to belong to Xorg instead.
Yea, looks like it. Reassigning...
Created attachment 140660 [details]
xdpyinfo -ext XFree86-VidModeExtension
XFree86-VidModeExtension version 2.2 opcode: 134, base error: 130
Vendor: , Model:
Num hsync: 0, Num vsync: 0
Tee hee. Pretty sure that's not going to work well.
Dan, can you retest this now? In particular with Xorg 18.104.22.168-5 or later. The
magic number fix we put in for making X start up properly in F7 xen should at
least make this fail in a new way.
It now reports a refresh rate of 0HZ, which sounds reasonable to me, given that
there isn't really any real refresh rate for the Xen paravirt framebuffer.
Looks like this was resolved....closing out as CURRENTRELEASE