I have the same problem - it starts to sleep, and then restarts. I'm on a t22 with the latest BIOS. My kernel is 2.6.15-26-386 #1 PREEMPT, my kernel opts are:
root=/dev/hda1 ro acpi=on ec_intr=0 vga=788 quiet splash Relevant output from dmesg: [17180133.796000] Stopping tasks: ================================================================== [17180140.296000] stopping tasks failed (1 tasks remaining) [17180140.296000] Restarting tasks...<6> Strange, kacpid-work-0 not stopped [17180140.296000] done [17180140.848000] ACPI-0412: *** Error: Handler for [EmbeddedControl] returned AE_TIME [17180140.848000] ACPI-0517: *** Error: Method parse/execution failed [\_SB_.PCI0.ISA_.EC__.CHKS] (Node cffc4560), AE_TIME [17180140.848000] ACPI-0517: *** Error: Method parse/execution failed [\_SB_.PCI0.ISA_.EC__.I2RB] (Node cffc45a0), AE_TIME [17180140.848000] ACPI-0517: *** Error: Method parse/execution failed [\_SB_.PCI0.ISA_.EC__.BAT0._BST] (Node cffc5ea0), AE_TIME Hope this helps! -- resume not quite working with Thinkpad T22 https://launchpad.net/bugs/29233 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs