http://bugzilla.kernel.org/show_bug.cgi?id=9151
Summary: Something broke cpufreq on laptop with lid behavior
Product: ACPI
Version: 2.5
KernelVersion: 2.6.23
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Other
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
Hello. I am on a Dell Inspiron 600m laptop with a 2GHz Pentium-M.
I've had 2.6.17.6 on my laptop and all worked splendidly.
I just switched to 2.6.23 and now the following power annoyances happen. As far
as I can tell, these things happen without any sort of helper daemon running,
ie a system just booted to a VT (but I guess I could be wrong)
When AC power is unplugged, the system clocks to its lowest speed but it also
throttles to 25%. I don't want the throttling and have to un-throttle it by
hand.
If the system runs on AC power, lid behavior is fine (backlight turns off via
radeontool). But if the system is on battery power and the lid is closed,
STRANGE things happen. The governor switches to powersave. If the lid is closed
on battery power, the CPU frequency begones the HIGHEST (2GHz).
scaling_min_freq and scaling_max_freq report 600MHz but scaling_cur_freq
reports 2GHz.
If I try changing the frequency to 600MHz (via cpuspeedy), the frequency won't
change unless I switch to some intermediate speed first, and then go all the
way down to 600MHz.
This seems most likely to be a kernel issue since it broke between 2.6.17.6 and
2.6.23 (maybe closer to 2.6.20). Switching back to the older kernel makes
everything work properly again. Have there been any major cpufreq changes?
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