The same problem: I upgraded my Ubuntu 64-bit from 10.04 to 10.10 (by upgrade process) yesterday, everything seemed to work perfectly until I removed the AC power lead. Shortly after I noticed that wifi disconnected and after 5 seconds or so laptop totally crashed with the white screen. Nothing helped but hard power off... I repeated the same few times more - always the same result - wifi disconnects and then hard lockup with white/black/purple/colorfull pattern on LCD.
Then I made the clean install of 10.10 but finished with the same problem... I tried to start OS while only on battery, it managed to get the login screen and then crashed... I've assumed that 10.10 is unusable for me at the moment and installed back the 10.04 from the backup - everything is OK. So the problem is definitely with 10.10. My basic HW info: Dell Vostro 1000, AMD TurionX2 2000MHz, 6GB DDR2, ATi Xpress 1150 Chipset (= RS485 NB + SB600 NB), Intel Wireless WiFi Link 4965AGN I do suspect the problem is in 10.10 kernel or intel wifi driver or ubuntu power-management software. 10.04 works fine on my laptop which is almost nonstop on (running BOINC). -- System (notebook) freze after electric cable is detached https://bugs.launchpad.net/bugs/660746 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
