Two more clue for this problem. When I switch from X to VT back to X, the keyboard still works to the extent that if I momentarily press and release the power switch and then press enter, the machine will power off exactly as though the power off pop-up was displayed (the default position is on shutdown). So this means that the main problem is that the display is not visible but the input devices are still functioning.
An even bigger clue is that the problem can be eliminated by enabling and then disabling the Power Manager Inhibit Applet via the panel on gnome. After enabling and then disabling the power manage inhibit applet, then switching from X to VT and then back to X works fine. This really argues that there is some issue between X and ACPI that happens to show up in the server kernel. It may potentially exist in the generic server but is possibly masked by the CFQ scheduling discipline in the generic kernel (I think that CFQ can diminish game frame rates in certain possibly pathological cases and is why I use the server version). -- switching from X to VT then back to X not working (ACPI related?) https://bugs.launchpad.net/bugs/526698 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers-180 in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
