Dell mini 10 doesn't wake up from suspend (powered standby)

"standby" as in "sleep" or "suspend"
exact model: Dell Inspiron 1012 (Dell Inspiron mini 10)

to reproduce:
* close the lid / choose suspend from power menu
* laptop suspends, power led starts slowly pulsing (ok)
* open the lid / press power button
* HDD starts spinning (ok)
* power LED goes from slowly pulsing into steady glow (ok)
* screen remains blank (not ok)

Only "solution" is holding the power button to force a power cut and then srarting up.

I have the same issue with a Dell D600 and 10.10 beta i386 desktop and a MSI U100 with 10.10 beta netbook remix.
These laptops used to have no issue coming back from standby with 10.04

this is a rather critical issue for a netbook

same thing happens when booting pristine 10.10 RC from USB stick, so it is not a problem of upgrade from 10.4.

I have the same issue on a Dell Mini (1018) with Ubuntu 10.10 (Maverick) just installed.
Can we provide some sort of hardware/software configuration or log to help to diagnose this problem?

I have also tried to set ACPI_SLEEP_MODE=standby in /etc/default/acpi-support but I don't have noticed any behaviour change.

The description of the parameter is:
# Change the following to "standby" to use ACPI S1 sleep, rather than S3.
# This will save less power, but may work on more machines

The important detail here is that it was working perfectly in 10.04 and it
fails in 10.10.
Is there a way to downgrade pm-utils or compare the default config files?

I just disabled Intel Speedstep in the BIOS and resuming works. (got the suggestion from bug #578673, linked from #632538 which appears to be a similar issue). This seems to be OK as a workaround for now, and may shed some light on the root cause of the issue.

Yes, I too can confirm Mark's observation that disabling sppeedstep helps.

I too can confirm this workaround, but this way the processor will be always at 100%. Hoping in a better solution...

I am also seeing the same issue as in Comment #2, on a Dell Mini 1018, Del BIOS v.A02. Have any patches or bugfixes for this issue been released? This is not new, has been reported many times, and should be addressed by now I would think

I would like to add my two cents to this. I just upgraded from 10.04 netbook edition to 10.10 netbook and it doesn't want to wake up. The only thing is to cut the power and restart. It kind of sucks when I don't think about it.

I was having the same problem on my Dell Mini 1012 with the 32-bit version of 11.04.
I discovered the Intel Atom N450 in it is actually a 64-bit processor, so I made a 64-bit 11.04 USB Desktop USB stick
and when I booted from it, the suspend/resume worked properly, so I did a clean install of the AMD64-bit version
of 11.04 and the suspend/resume has been working fine. Now if we can just get the bluetooth fixed!

After upgrading to current 11.10 and upgrading BIOS to A12 I again enabled SpeedStep and there was no more problem for me.
Not sure if the fix was in ubuntu or in BIOS though.
Someone please try just the Ubuntu upgrade first, without upgrading the BIOS.

Latest BIOS can be downloaded from:
http://support.dell.com/support/downloads/driverslist.aspx?c=us&cs=19&l=en&s=dhs&ServiceTag=&SystemID=inspiron1012&os=BIOSA&osl=EN
(sadly it requires windows for flashing).

Štefan Baebler, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/640066/comments/15 regarding this being fixed with an update. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.