I am also experiencing this problem on Ubuntu 9.04. /proc/acpi/ symptoms are exactly as described in this report.
Linux itlan.zanshin.com 2.6.28-15-generic #52-Ubuntu SMP Wed Sep 9 10:49:34 UTC 2009 i686 GNU/Linux
Output from lshw is attached.
I am also experiencing this problem on Ubuntu 9.04. /proc/acpi/ symptoms are exactly as described in this report.
Linux itlan.zanshin.com 2.6.28-15-generic #52-Ubuntu SMP Wed Sep 9 10:49:34 UTC 2009 i686 GNU/Linux
Output from lshw is attached.