https://bugzilla.kernel.org/show_bug.cgi?id=42946
Summary: Toshiba Portege M901(Series M900) fan can't start
properly
Product: ACPI
Version: 2.5
Kernel Version: 3.2.1-gentoo-r2
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Fan
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
Hello everyone, Bonjour
Due to the need of study, I installed Linux on my laptop Toshiba Portégé
M901(Series M900), Right now I am struggling to fix a problem with my fan
control. Here is the problem:
In fact, during the starting procedure, the fan stops turning after loading the
acpi control(I think. In fact, that occurs when this error appears:"pci0000:00:
ACPI _OSC request failed (AE_NOT_FOUND), returned control mask: 0x1d"), then
the fan will never start unless the CPU temperature drops and passes through
85, 75, 65 or 55 degrees. If it starts turning, the fan works better, it seems
that the speed could be adjusted according to CPU temperature.
I've tried everything that I could find from internet, such as adding
acpi_osi="Linux", acpi.power_nocheck=1, etc. as options to the bootloader)
except for fixing the DSDT. I didn't succeeding in fixing it, I don't
understand that and how to do that. There are too many warnings but no error,
so I guess it may not be the problem source.
I look at the /proc/acpi, it seems that some respiroties should have existed
like thermal_zone or fan[see attachment "proc_acpi"]. In /proc/acpi/toshiba,
there isn't file "fan" either. I tried detect my fan by lm_sensors but failed
with information which is my chipset ITE IT8512 is not supported. It showed
only my cpu and chipset temperature. acpitool is installed too but doesn't find
right fan device.
On the contrary, from the output of dmesg, it implies that the fan is on and
"acpi device:07: registered as cooling_device8" is registed [see attachment
"dmesg"]. But after verifing, the value of ***/cooling_device8/type is "LCD"
while ***/cooling_device0/type is "fan". So weird.[see attachment
"thermal_zone"]
I don't know what is wrong, where I could start? I still haven't fixed the fan
control. So I would like to know if you have some ideas about this issue. Here
are some information in attachement files about my laptop and system. I'll be
very grateful for your help. Many thanks. If you need more information, say it
please.
Best regards
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