Looks like this bug has been dormant for a few months. Rather than file a new report I'm going to chime in here to say that I have this exact problem. I have a Thinkpad G41 running an up-to-date fresh install of Ubuntu Hardy (with a few small config tweaks). My laptop reliably suspends-to-RAM EVERY time I unplug the power cord (with the exception of immediately after it has booted).
My laptop worked fine in Feisty. I believe this problem started at some point in Gutsy (at- or post-upgrade, I don't recall), and is now still here in Hardy. I want to suggest that this bug may be also related to bug #146424, bug #157467, bug #44863, and/or the early (supposedly fixed) bug #33072. Some data: $ uname -r 2.6.24-16-generic $ lshal -m Start monitoring devicelist: ------------------------------------------------- 01:13:57.833: computer_power_supply_battery_BAT1 property battery.remaining_time = 6644 (0x19f4) 01:13:57.837: computer_power_supply_battery_BAT1 property battery.charge_level.current = 5321 (0x14c9) 01:13:57.840: computer_power_supply_battery_BAT1 property battery.reporting.current = 5321 (0x14c9) 01:13:57.843: computer_power_supply_battery_BAT1 property battery.rechargeable.is_discharging = true 01:13:57.847: computer_power_supply_battery_BAT1 property battery.rechargeable.is_charging = false 01:13:57.861: computer_power_supply_ac_adapter_AC property ac_adapter.present = false 01:13:58.233: computer property power_management.is_powersave_set = true 01:14:01.374: net_00_0e_9b_bc_20_e4_0 removed 01:14:01.431: net_00_0e_9b_bc_20_e4 removed 01:14:01.483: net_00_06_1b_c7_a1_e4 removed 01:14:27.388: computer_power_supply_battery_BAT1 property battery.remaining_time = 6634 (0x19ea) 01:14:27.393: computer_power_supply_battery_BAT1 property battery.charge_level.current = 5313 (0x14c1) 01:14:27.394: computer_power_supply_battery_BAT1 property battery.reporting.current = 5313 (0x14c1) 01:14:28.142: net_00_06_1b_c7_a1_e4 added 01:14:28.994: net_00_0e_9b_bc_20_e4 added 01:14:28.994: net_00_0e_9b_bc_20_e4_0 added Relevant entries from /var/log/acpid: [Tue May 6 01:13:57 2008] received event "battery BAT1 00000080 00000001" [Tue May 6 01:13:57 2008] notifying client 5156[111:123] [Tue May 6 01:13:57 2008] notifying client 5335[0:0] [Tue May 6 01:13:57 2008] notifying client 5335[0:0] [Tue May 6 01:13:57 2008] executing action "/etc/acpi/power.sh" [Tue May 6 01:13:57 2008] BEGIN HANDLER MESSAGES Laptop mode enabled, active. [Tue May 6 01:13:59 2008] END HANDLER MESSAGES [Tue May 6 01:13:59 2008] action exited with status 5 [Tue May 6 01:13:59 2008] completed event "battery BAT1 00000080 00000001" [Tue May 6 01:13:59 2008] received event "ac_adapter AC 00000080 00000000" [Tue May 6 01:13:59 2008] notifying client 5156[111:123] [Tue May 6 01:13:59 2008] notifying client 5335[0:0] [Tue May 6 01:13:59 2008] notifying client 5335[0:0] [Tue May 6 01:13:59 2008] executing action "/etc/acpi/power.sh" [Tue May 6 01:13:59 2008] BEGIN HANDLER MESSAGES [Tue May 6 01:14:00 2008] END HANDLER MESSAGES [Tue May 6 01:14:00 2008] action exited with status 0 [Tue May 6 01:14:00 2008] completed event "ac_adapter AC 00000080 00000000" [Tue May 6 01:14:27 2008] received event "battery BAT1 00000081 00000001" [Tue May 6 01:14:27 2008] notifying client 5156[111:123] [Tue May 6 01:14:27 2008] notifying client 5335[0:0] [Tue May 6 01:14:27 2008] notifying client 5335[0:0] [Tue May 6 01:14:27 2008] client has disconnected [Tue May 6 01:14:27 2008] executing action "/etc/acpi/power.sh" [Tue May 6 01:14:27 2008] BEGIN HANDLER MESSAGES [Tue May 6 01:14:27 2008] END HANDLER MESSAGES [Tue May 6 01:14:27 2008] action exited with status 0 [Tue May 6 01:14:27 2008] completed event "battery BAT1 00000081 00000001" [Tue May 6 01:14:27 2008] received event "battery BAT1 00000081 00000001" [Tue May 6 01:14:27 2008] notifying client 5156[111:123] [Tue May 6 01:14:27 2008] notifying client 5335[0:0] [Tue May 6 01:14:27 2008] executing action "/etc/acpi/power.sh" [Tue May 6 01:14:27 2008] BEGIN HANDLER MESSAGES [Tue May 6 01:14:27 2008] END HANDLER MESSAGES [Tue May 6 01:14:27 2008] action exited with status 0 [Tue May 6 01:14:27 2008] completed event "battery BAT1 00000081 00000001" I also read the contents of https://wiki.ubuntu.com/DebuggingGNOMEPowerManager, but I didn't see anything there that seemed obviously relevant to this issue. I'd be more than happy to perform any tests that anyone can suggest. Thanks! -- g-p-m suspends laptop on unplugging event https://bugs.launchpad.net/bugs/139291 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