Gak. Okay, I now have a clearer understanding of what's going on.
There is in fact a "suspend" item in the menu. When I use that, I get the same result as "sudo pm-suspend":
- Screen blanks
- All fans keep running
- Monitor does not go into power-save mode
- Nothing will "wake" the computer
- Scroll/Caps/Num lock keys have no effect on keyboard LEDs; Num Lock light is stuck on, others stay off
So I have to power down the PC (i.e. hold down the power button several seconds).
Another detail: I have VMware Workstation Tech Preview March 2012 installed. Maybe that's interfering with sleeping. I don't think I tried Suspend before installing VMware, but I don't remember.
I still think they should have called it "Sleep" instead of "Suspend".
Kevin
On Fri, Jun 8, 2012 at 5:20 PM, Glen Ditchfield
<GJDitchfield@acm.org> wrote:
On June 7, 2012 09:28:23 PM Kevin McGregor wrote:
> I installed Ubuntu 12.04 on my desktop PC, and I've found that I only
> have the option to hibernate or power off, and not sleep! Is this normal?
I think it's supposed to be the other way around. The discussion is at
https://bugs.launchpad.net/ubuntu/+source/policykit-desktop-
privileges/+bug/812394
(I use Kubuntu 12.04, and get all of the options. Hibernate fails about a
third of the time on my HP 8440p, and isn't noticably faster than booting from
scratch.)