My laptop sometimes doesn't go to standby

Log a bug.Toshiba have a lot of issues with ACPI and Linux.

I recommend reading these instructions carefully before reporting the bug:
https://help.ubuntu.com/community/ReportingBugs

That makes the bug reporting process easier, and it helps you create bug reports that are most useful. After that, log the bug with Apport.

Ok so, there are no ways to solve my problem right??? If the answer is "yes" please tell me a computer which hasn't problems with acpi. Thanks; I'm sorry for my english but I'm not british so I speak english not very well.

There may very well be a way to solve your problem (bugs can have workarounds, and they can also be fixed once they are know about), but no one who knows the fix has posted here yet. Filing a bug will likely improve the chances of getting a fix considerably, but it's no guarantee.

Current laptop testing results are at http://laptop.qa.ubuntu.com/qatracker/laptop. Old results are at https://wiki.ubuntu.com/LaptopTestingTeam/Old. Please note that these are not lists of supported hardware--they are lists of tests results, so it's necessary to examine the results to see how well each model worked. You may also want to take a look at http://linux-laptop.net, and to search Google (for example, http://www.google.com/search?sourceid=chrome&client=ubuntu&channel=cs&ie=UTF-8&q=ubuntu+supported+laptops). There may be other sites that I should be listing here, but I don't know of them.

Scuse me when I wrote the last post I made a mistake: I wrote "solved"but it isn't solved!
What I have to do to log my bug?? Thanks

"What I have to do to log my bug??"

Did you read https://help.ubuntu.com/community/ReportingBugs?

Yes, I read it but are there computers that aren't problems with acpi and Ubuntu?

"Yes, I read it"

If you decide to report this as a bug, and you still need assistance doing so, please post again with specifics about the problem you're having reporting it.

"but are there computers that aren't problems with acpi and Ubuntu?"

Yes, acpi works fine on the majority of computers, and more specifically, suspend works correctly on most laptops. For details (as I said above):

"Current laptop testing results are at http://laptop.qa.ubuntu.com/qatracker/laptop. Old results are at https://wiki.ubuntu.com/LaptopTestingTeam/Old. Please note that these are not lists of supported hardware--they are lists of tests results, so it's necessary to examine the results to see how well each model worked. You may also want to take a look at http://linux-laptop.net, and to search Google (for example, http://www.google.com/search?sourceid=chrome&client=ubuntu&channel=cs&ie=UTF-8&q=ubuntu+supported+laptops). There may be other sites that I should be listing here, but I don't know of them."

Ok I look at the web sites but they don't solve my problem, I make a thread on Linux on laptops, that regards my problem with suspend. Am I on the right street to solve my problem??