suspend/resume porblems with centrino duo
Bug #64070 reported by
Gabriele Postorino
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
High
|
Unassigned | ||
linux-source-2.6.17 (Ubuntu) |
Won't Fix
|
High
|
Unassigned |
Bug Description
Binary package hint: linux-image-
On my laptop with Core Duo T2400 after resume the second core stays always on maximum frequency, also changing the governor, but there aren't processes that use much cpu.
Changed in linux-source-2.6.17: | |
status: | Unconfirmed → Confirmed |
Changed in linux-source-2.6.17: | |
importance: | Undecided → High |
Changed in linux-source-2.6.17: | |
assignee: | nobody → ubuntu-kernel-team |
Changed in linux-source-2.6.17: | |
status: | Confirmed → Triaged |
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I have the same exact problem, so it is confirmed.
This is a kubuntu Edgy 6.10 install on a Toshiba A100-TA6.
It has T2250 Centrino Duo.
When the laptop is rebooted, both CPUs are running at 800MHz most of the time, and one or the other goes up to the full 1733MHz.
This happens upon resuming from suspend, or from hibernate. The fan also goes fast and I can feel air coming out of the vents.
It goes back to normal if I reboot the laptop.
See this:
$ grep MHz /proc/cpuinfo
cpu MHz : 800.000
cpu MHz : 1733.000
The puzzling part is that both CPUs are in the same ACPI state regardless:
$ diff /proc/acpi/ processor/ CPU? processor/ CPU0/info /proc/acpi/ processor/ CPU1/info processor/ CPU0/power /proc/acpi/ processor/ CPU1/power 000000000073677 03269] 000000000074329 76070]
diff /proc/acpi/
1,2c1,2
< processor id: 0
< acpi id: 0
---
> processor id: 1
> acpi id: 1
diff /proc/acpi/
6c6
< *C2: type[C2] promotion[--] demotion[C1] latency[001] usage[01822333] duration[
---
> *C2: type[C2] promotion[--] demotion[C1] latency[001] usage[01743842] duration[