Problem with suspend to RAM and resume while using USB Devices.

[Zum Kuckuck]

Binary package hint: gnome-session

 I loaded a Word file from a USB stick. Later I went to suspend to RAM. During the netbook was down I disconnected the USB stick. Afterwards resume failed. Resume runs fine when the USB stick remaines connected. Same problem with USB Prepaid mobile Internet.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: gnome-session-bin 2.32.1-0ubuntu19
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
Date: Wed Apr 13 20:54:09 2011
ExecutablePath: /usr/bin/gnome-session
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
ProcEnviron:
 LANGUAGE=de:zh_CN
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-session
UpgradeStatus: No upgrade log present (probably fresh install)

[Zum Kuckuck (aufdemwasen)]

I was testing it again with a prepaid mobile Internet USB stick. I went to suspend and disconnected the stick, while the netbook was sleeping. Before resume I connected the stick again. With the results:
resume after 1 minute was working fine
resume after 10 minutes was working fine
resume after 30 minutes failed
may be that the problem is the time of resume instead of the USB stick. I was working with the netbook and resume failed sometimes after long sleep (30 - 60 minutes and longer).

[Zum Kuckuck (aufdemwasen)]

I was suspending to RAM without USB stick. The netbook slept 30 minutes and resumed fine. I try to find what makes resume fail.

[Zum Kuckuck (aufdemwasen)]

Today I ran 6 time suspend and resume with and without USB stick (with 30 - 60 minutes sleep) while I was working and it always ran fine. I don't know why it sometimes failed the last days. May be the last update fixed the issue.
When suspend and resume fails again I will write it down here.

[Zum Kuckuck (aufdemwasen)]

Yesterday I ran 4 times suspend to RAM and resume failed 2 times.
Today I used 3 times suspend to RAM. Resume worked 2 times fine and failed one time.
I can't find a pattern. I can't say under which circumstances the issue can be reproduced.

[Zum Kuckuck (aufdemwasen)]

I don't know whether anybody will read what I am writing.
There is always an error message which appears before suspend and resume. I could not read it because it disappeared quickly.
Yesterday suspend/resume worked three times fine. The fourth time the netbook was frozen right after the error message appeared. So I could write it on a paper and I will post it here:

425.7024331 ath: DMA failed to stop in 10 ms AR_CR=Oxdeadbeef AR_DIAG_SW=Oxdeadbeef
425.7024391 ath: Could not stop RX, we could be confusing the DMA engine when we start RXup
425.7136681 ath: DMA failed to stop in 10 ms AR_CR=Oxdeadbeef AR_DIAG_SW=Oxdeadbeef
425.8266ß41 ath: Chip reset failed
425.8267011 ath: Unable to reset channel (2412 MHz) , reset status -22

[Pedro Villavicencio (pedro)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue that you reported is one that should be reproducible with the live environment of the Desktop CD of the stable release - Oneiric Ocelot. It would help us greatly if you could test with it so we can work on getting it fixed. You can find out more about the development release at http://www.ubuntu.com/testing/ . Thanks again and we appreciate your help.

[Zum Kuckuck (aufdemwasen)]

I have tested the live-CD.
First of all: I have tested many live-CD of different distributions, but suspend to RAM worked never properly from the live environment.
I started the live CD and suspended to RAM with the keys Fn + F3. The first time resume worked fine.
At the second try resume failed in the usual manner: The green led (usually for the hard disk) blinked on time shortly. The orange led for the WLAN started to shine a little bit later. Then the system hang.
The issue appears between the first and the second blink of the green led (hard disk). When the green led blinks twice resume works always fine.
Restart on battery works fine. On AC I can reproduce the issue as often as I want. I push the Start button, the green led blinks shortly the orange led begins to shine and the system hangs. I have to disconnect the netbook from power and connect again. Then I can restart.
I would be surprised if you get resume working 100 % stable. I tried many scripts and settings. Sometimes I managed to reduce the failure rate to 10 %, but never to 0 %.

[Launchpad Janitor (janitor)]

[Expired for gnome-session (Ubuntu) because there has been no activity for 60 days.]