Samsung N230 with xubuntu 10.10 fresh installed does not resume after suspend

[stefano]

Laptop Samsung N230 Model NP-N230-JA01IT
xubuntu 10.10 32 bits fresh installed and upgraded.
(latest alsa-driver installed from repository ppa:ubuntu-audio-dev/ppa)

suspend woks fine (apparently) but on resume the laptop is frozen
(the screen is black and keyboard does not work)

[Julien (julien-t43)]

Same problem here with ubuntu 10.10 and N230, NP-N230-JA01FR.

Hibernation works ok but not sleeping/lid closing. When opening/reactivating laptop, power/wifi led lightens almost immediately but screen stays black whatever is done. Could only force restart.
Feel free to ask for more informations or dmesg.

[Charlie Kravetz (cjkgeek)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We need some more information from you before we can start working on this bug.

Please include the information requested at https://wiki.ubuntu.com/DebuggingKernelSuspend as separate attachments.

[Julien (julien-t43)]

I added requested file. sadly, if there is "Magic number" line, there is no "hash matches" ...
from netbook led (when suspending, power led flashed; when resuming, power/wifi are on and hard disk briefly on), I would say netbook is resuming and problem is with display which stays black/shutdowned.

[Joss Wright (joss-launchpad)]

As someone who is also having this problem, I can confirm that the problem is definitely not just a display issue.

Two cases:
1) Play an audio file and suspend whilst playing. On resume, no audio will be heard.
2) Try to ssh into the machine after resume. The machine will not be found on the network.

I haven't been able to get anything useful from the logs that I can see on my machine. For the moment my only "workaround" is to hibernate the machine on lid-close rather than suspend.

[Joss Wright (joss-launchpad)]

(Just to add: the magic SysRq combinations don't work on resume either.)

[Joss Wright (joss-launchpad)]

This is still marked as incomplete. Is there any more information we can provide to move this forward?

[Charlie Kravetz (cjkgeek)]

Thanks for reporting this bug and any supporting documentation. Since this bug has enough information provided for a developer to begin work, I'm going to mark it as confirmed and let them handle it from here. Thanks for taking the time to make Ubuntu better!

I am marking it triaged, but am unsure it is not going to be changed to a kernel issue. If that happens, each person will need to file a separate bug using "ubuntu-bug linux".

[Joss Wright (joss-launchpad)]

This seems to be a kernel issue, and to have a workaround. See: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/640100?comments=all

In short, adding intel_idle.max_cstate=0 to the kernel boot options (in /etc/default/grub) will resolve this problem. More details at the link above.

(It works for me, based on a few tries.)

[Francesco Bonanno (mibo-fra)]

I have the same problem with an eeepc 1001px and Ubuntu 12.04 LTS, so I filed another bug for my eeepc https://bugs.launchpad.net/ubuntu/+source/uswsusp/+bug/999935, but I have to try to recompile the kernel 3.0 series on my netbook and run uswsusp; 'cos I think the problem is in the kernel. I have only this chance.