Suspend/Hibernate not working Dell Inspiron M5010

(I'm marking this as affecting Wubi, in case this is a Wubi-specific problem. Perhaps bcbc or other Wubi answer contacts will mark it back, if it isn't.)

Well hibernation doesn't work with Wubi... but there does seem to be an issue with this computer (unrelated to Wubi). I assume this is release 10.10 you are using since you installed 4 months ago (and 11.04 only came out 3 months ago).

I've looked around and it seems that the "pci=noacpi" option is required for the M5010. But I can't personally vouch for this. Please refer to: http://ubuntuforums.org/showthread.php?t=1633642

To see specifically what that option does please refer to http://tldp.org/HOWTO/BootPrompt-HOWTO-4.html
Quote:
4. Boot Arguments to Control PCI Bus Behaviour (`pci=')
  The `pci=' argument (not avail. in v2.0 kernels) can be used to change the behaviour of PCI bus device probing and device behaviour. Firstly the file linux/drivers/pci/pci.c checks for architecture independent pci= options. The remaining allowed arguments are handled in linux/arch/???/kernel/bios32.c and are listed below for ???=i386.
...
4.6 The `pci=noacpi' Argument
  This disables the use of ACPI routing information during the PCI configuration stages."

(There, clear as mud).

PS you can check if there are any errors when you suspend. Go to a terminal (CTRL+ALT+t) and run:
cat /var/log/syslog | grep PM:

Thanks for the info. It seems I may be sunk for now. I am running 11.04 btw, I did update. I also tried updating to the newest kernel, but that did not do anything and for the moment, I am still booting to the kernel that came with 10.10. I am guessing from everything I am reading that turning off acpci is what disables the power management feature. It seem to me that there must be a way to get this working, since it works fine in Windows and other Linux distros. I will try to get any errors that are generated and then create a bug report.

Also, you said hibernation does not work with wubi. Is this true with suspend as well? Perhaps my research should just end right now if that is the case. Is there a way to make this into a regular dual book system by removing wubi?

I may be wrong but I don't think "pci=noacpi" is the same as "noacpi" or "acpi=off". It's worth a try anyway (won't do any harm and if you find the battery functions are gone, then just reboot).

Wubi does support "Suspend". Just not "Hibernate". Since you have problems suspending, it won't make any difference installing without Wubi. Unless perhaps the pci=noacpi fixes the problem you have. Then you should be able to suspend (in both) and hibernate in a normal install.***

To migrate a wubi install: http://ubuntuforums.org/showthread.php?t=1519354
Or if you don't have anything you want to keep on the Wubi, you can uninstall (select "Ubuntu" from Add/Remove programs in Control Panel) and install fresh. (NOTE: uninstall wubi will delete everything you have on your Wubi Ubuntu).

*** hibernation requires a swap partition that is at least the size of your RAM.