I have a Dell Latitude D830, running Ubuntu 9.04 64-bit. It used to suspend and hibernate fine, without any issues, but all of a sudden (I'm not sure when), it stopped waking up from both suspend and hibernate. When I "power" the computer back on, all I get (after the initial Dell screen) is a white flashing cursor in the top left corner of my screen.

I searched around pretty much everywhere and tried every fix I could find. Nothing works except (this is the strange part) when I enable suspend to ram "tracing." When I enable this option, suspend works perfectly...other than the side effect of my date/time being completely wrong at boot, so I have no way of logging what exactly is going wrong.

In case someone doesnt know, the "tracing" writes dmesg to the memory chip that keeps time/date so it can be saved when the system reboots.

Thanks in advance.

When you type
cat /sys/power/state

what does it say?

"mem disk"

have you tried the -d option on acpid

/usr/sbin/acpid -d

This grabs a terminal and logs everything. Start with hibernate. I never bothered to get suspend sorted. You need resume= pointing to your swop partition (e.g. resume=/dev/sda9)

sync; echo -n > /sys/power/state

There is also a kernel bopot option for console debug 'no_ocnsole_suspend'
Add that to your boot line

Thanks, I got hibernate working.
Suspend is still the same. It appears that no_console_suspend doesn't anything, I still get the flashing dash when I try to resume.

"/usr/sbin/acpid -d"
returns: "acpid: can't open /proc/acpi/event: Device or resource busy"

and I'm not sure what you mean by "sync; echo -n > /sys/power/state" Should I be echoing something into that file?

Try in the logs, or google for it. I mentioned it because it appears after a successful suspend. Never used it myself


That's because acpid is already running. stop the service first.
Try pasting it into a console and see

I did a bit more searching around and added "acpi_sleep=s4_nohwsig" (in addition to no_console_suspend) and also removed "quiet" and "splash", to see if it would show what it was doing and that fixed it. I tried replacing quiet and splash, but it will not work with them in the boot parameters. I have no idea why that would make a difference, but it works and doesn't mess anything up.

Thanks a lot for your help.