Description of problem: Running the F15 graphics test day in a VM. No way to blank the screen as suggested during the test. Version-Release number of selected component (if applicable): xorg-x11-server-Xorg-1.9.99.1-4.20101201.fc15.x86_64 How reproducible: 100% Steps to Reproduce: 1. create a qemu-kvm VM that uses the latest F15 install 2. in a terminal: sleep 5 && xset dpms force off 3. Actual results: no effect - not even a screen blink Expected results: blank screen until the next input to the VM Additional info: I don't know if this is an artifact of using the vnc connection of virt-manager to see the VM's graphics, or if it is a real bug in the xorg-x11-server for not blanking the screen when using the virtual graphics adapter provided by qemu-kvm.
in case it matters: the host for my VM is fedora 14, using qemu-kvm-0.13.0-1.fc14.x86_64
Created attachment 480551 [details] xorg log
smolt profile of VM: http://www.smolts.org/client/show/pub_e443c41c-017e-4839-a18e-fb570e8da6af haven't created an xorg.conf
If anything this would be a bug in qemu's emulation. DPMS certainly works on real cirrus hardware.
http://cvs.savannah.gnu.org/viewvc/vgabios/clext.c?root=vgabios&r1=1.12&r2=1.13 Apparently (according to #qemu irc) this is the code that implements reporting of dpms capabilities, but it returns error "unimplemented" for all other requests. So it supports dpms but doesn't go as far as implementing it.
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Present in a F17 guest
Since DPMS is something that happens in the display, not in graphics hardware(*), perhaps the right place to implement this is in vnc and/or spice. * Though I think some drivers do take the opportunity to save power, right?
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