I have an older HP desktop (from 2004), but that is not the issue.
10.04 uses a new kernel mode (KMS) video driver that can interfere with suspend, or at least it does with my ATI X1300 video. I could not suspend or hibernate with the default kernel mode radeon driver, and it also seemed to slow up video on my system (glxgears was not moving, just jerking occasionally).
So I disabled KMS to use the user space module. That seems faster (glxgears runs smoothly "much" faster) and suspend and hibernate work.
So try that and see if that helps. To do that from the grub menu, press e, and then after quiet splash add a space and nomodeset. If that helps add it to /etc/default/grub (use sudo prefix on your editor) and sudo update-grub. Putting it on the 2nd line like below would use it for all kernels including (recovery).
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX="nomodeset"
I have the same problem on Compaq/HP notebook worked fine on Ubuntu 9.10, but closing lid no longer makes system suspend or hibernates on 10.04.
I have attempted to make changes to "System-Preferences-Power Management".
Selecting either "blank screen" or "suspend" or "hibernate" on bat power or ac power has no effect.
Attempting to make default also has no effect
Appears to be a possible bug.
I have attached shot of Battery PMP screen (my AC is pretty much the same)
I tried changing "nomodeset" but it made no difference.
(I have Intel 945 Video - also not well supported by Intel on Linux/Ubuntu)
I have the same problem on my mivvy G310 netbook.
it is a default N450 config netbook.
Did anyone file a bug for this?
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anyone? Same problem with my mini and no solutions seen sofar
bump
Nemo
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