Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have XUbuntu 9.10 installed on a Toshiba NB200 netbook with Intel video card that's handled with i915 driver.

With 2.6.31 stable, recommended kernel everything but WiFi works fine: Atheros ath9k WiFi shows too small signal power and loses packets in 'bursts' sometimes.

With 2.6.32-* (I tested -9 to -11 from Ubuntu's kernel unstable ppa) everything works fine just prior to first suspend: echo mem >/sys/power/state. After it random unidentified fullscreen 'one-frame' flickering begins in Xorg, and after a couple of minutes everything eventually hangs while showing filled grey (not white; it is like default button colour) screen; no X keys are working: Ctrl+Alt+Fn don't, blind typing in console too. Magic SysRq still works and I was able to reboot.

Also there is one out-of-tree kernel module called omnibook that is required to turn on WiFi and Bluetooth.

Any advices?

share|improve this question

migrated from Jan 19 '10 at 22:15

This question came from our site for professional and enthusiast programmers.

Someone said that KMS (kernel mode setting) may be involved. Is that true? – whitequark Jan 20 '10 at 18:16
After full upgrade to lucid everything is the same. – whitequark Jan 21 '10 at 9:46

First: You should try a vanilla kernel from Here you can find a VERY good howto!. Second, i915 is being worked on. Intel just dropped UMS totally (the opposite of KMS, the one which were used recently.). If I remember clearly, some update arrived into the 2.6.33. If the first method wont work, just try to use madwifi with the 2.6.31. I tried, and I had a success with it. (Do a google search and you'll find many good docs how to blacklist current ath9k and use madwifi.)

share|improve this answer
Thanks, the howto is very good, will try it now. One question about madwifi: does it support connecting in both the monitor and infrastructure mode (ath9k does)? That's important for me. – whitequark Jan 24 '10 at 11:00
The wiki page says so. . I had to change to madwifi cuz' I wanted to share my internet connection and ath9k didnt work like I wanted to. – Shiki Jan 25 '10 at 12:17
up vote 0 down vote accepted

So after Xorg upgrade the problem disappeared, and even 2.6.32-11 kernel works now. Hope this would help someone.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.