Excessive battery usage in ACPI sleep
Bug #65856 reported by
Marius Gedminas
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux-source-2.6.17 (Ubuntu) |
Won't Fix
|
Undecided
|
Unassigned | ||
linux-source-2.6.20 (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
Binary package hint: linux-image-
After I've upgraded to Edgy lately I started noticing that my Thinkpad T42 uses up about 90% of the battery while sleeping. Dapper used to use about 10% overnight.
The files in /proc/acpi/battery indicate that my battery still has 88% of design capacity. 90% of that during 15 hours of sleep is about 2500 mW. Could bug 8711 or something like it be back?
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Before the upgrade my /var/log/kern.log used to contain these messages:
radeonfb (0000:01:00.0): suspending to state: 2...
radeonfb (0000:01:00.0): switching to D2 state...
now I only get
radeonfb (0000:01:00.0): suspending to state: 2...
I suppose I should try to modprobe radeonfb force_sleep=1 next. Maybe my laptop (Thinkpad T42 2373-FWG) is not mentioned in the whitelist?
http:// thinkwiki. org/wiki/ Problem_ with_high_ power_drain_ in_ACPI_ sleep asks for the output of lspci -d "1002:*" -vn, here is mine:
01:00.0 0300: 1002:4c57
Capabilities: <access denied>
Subsystem: 1014:0530
Flags: bus master, stepping, fast Back2Back, 66MHz, medium devsel, latency 66, IRQ 11
Memory at e0000000 (32-bit, prefetchable) [size=128M]
I/O ports at 3000 [size=256]
Memory at c0100000 (32-bit, non-prefetchable) [size=64K]
[virtual] Expansion ROM at c0120000 [disabled] [size=128K]