[ltp] HPET timer on thinkpads?

[Leon Brokken]

Thanks Dan, here's the output of the script to check the power drain
during suspend:

leon@shpritsz:~/myscripts$ cat /var/log/battery.log
Fri Oct 26 10:27:35 CEST 2007
before: 29500 mWh
after: 28380 mWh
diff: -1120 mWh
seconds: 3250 sec
result: -1240 mW
Your model seems to be affected.

I have added T41 2373-8RG to the 'affected' list on thinkwiki.
I will check later if "radeon_force_sleep=1" boot parameter makes a
difference.

Cheers, Leon.


Dan Sawyer wrote:
> Leon,
>
> Thank you very much. That was very helpful.
>
> There are a couple of ways you can check. There is a script on the
> think pad wike to test power.
>
> The other is to read the battery charge (cat
> /proc/acpi/battery/BAT0/*) suspend the machine for 1 or more hours and
> then reread the charge. The difference should be about 500mw per hour.
>
> Dan
>
> Leon Brokken wrote:
>> Hi Dan,
>>
>> uhm, how would I check that, without waiting for the batt to run out?
>>  .config is attached.
>>
>> Cheers, Leon.
>>
>>
>> Dan Sawyer wrote:
>>   
>>> Leon,
>>>
>>> Does the low power suspend work on your configuration? If so can you
>>> your .config script.
>>>
>>> Thanks - Dan
>>>
>>> Leon Brokken wrote:
>>>     
>>>> Hi Shem,
>>>>
>>>> Shem Multinymous wrote:
>>>>   
>>>>       
>>>>> Hi Leon,
>>>>>
>>>>> On 10/23/07, Leon Brokken <leon.brokken@med.lu.se> wrote:
>>>>>   
>>>>>     
>>>>>         
>>>>>> Could that explain the hangs every now and then, when my T41 doesn't
>>>>>> accept any input any longer? Processes keep running but there is no info
>>>>>> from fan, batt or temp available (judged from conky system monitor).
>>>>>> Even the power button doesn't work anymore, I need to power off by
>>>>>> unplugging AC and removing the battery.
>>>>>>     
>>>>>>       
>>>>>>           
>>>>> Judging by the symptoms, what you're seeing is a hang of the embedded
>>>>> controller (which is running its own firmware independently of the CPU
>>>>> and handles all the things you mentioned). This is very dangerous,
>>>>> since the EC is also in charge of fan control, battery charging
>>>>> control and emergency thermal shutdown.
>>>>>
>>>>> It's important to find out what causes the EC hangs. How often do you
>>>>> see them? Are they correlated with some activity or configuration?
>>>>> Does unloading some modules (in particular acpi, hdaps, tp_smapi)
>>>>> prevent them? Are you using an old version of tp_smapi?
>>>>>   
>>>>>     
>>>>>         
>>>> In the meantime I found out that tp_smapi (v0.32) was not loaded. I have
>>>> now added it to rc.modules so it gets loaded at boot and haven't noticed
>>>> a problem yet. Before it happpened maybe once every few days, without
>>>> any obvious pattern. I have a T41, Slackware-current, kernel 2.6.23.1. I
>>>> never noticed similar issues with 2.6.22.
>>>>
>>>> Anyway, here's some output from dmesg:
>>>>
>>>> leon@shpritsz:~$ dmesg|grep -i thinkpad_ec
>>>> thinkpad_ec: thinkpad_ec 0.32 loaded.
>>>>
>>>> leon@shpritsz:~$ dmesg|grep -i smapi
>>>> tp_smapi 0.32 loading...
>>>> tp_smapi successfully loaded (smapi_port=0xb2).
>>>>
>>>> leon@shpritsz:~$ dmesg|grep -i hdaps
>>>> hdaps: initial mode latch is 0x01
>>>> hdaps: setting ec_rate=250, filter_order=2
>>>> hdaps: fake_data_mode set to 0
>>>> hdaps: device successfully initialized.
>>>> input: ThinkPad HDAPS joystick emulation as
>>>> /devices/platform/hdaps/input/input9
>>>> input: ThinkPad HDAPS accelerometer data as
>>>> /devices/platform/hdaps/input/input10
>>>> hdaps: driver successfully loaded.
>>>> leon@shpritsz:~$
>>>>
>>>> leon@shpritsz:~$ dmesg|grep thinkpad_acpi
>>>> thinkpad_acpi: ThinkPad ACPI Extras v0.18-20071013
>>>> thinkpad_acpi: http://ibm-acpi.sf.net/
>>>> thinkpad_acpi: ThinkPad BIOS 1RETDRWW (3.23 ), EC 1RHT71WW-3.04
>>>> thinkpad_acpi: IBM ThinkPad T41
>>>> leon@shpritsz:~$
>>>>
>>>> I'll report back if it happens again.
>>>>
>>>> Thanks, Leon.
>>>>
>>>>   
>>>>       
>>
>>   

-- 
Leon J.S. Brokken
Tumour Biology, Dept. of Laboratory Medicine, Lund University
UMAS, CRC, Entrance 72, House 91, Floor 10, 20502 Malmö, Sweden
Tel. +46(0)40391104, +46(0)739531450 (gsm), Fax +46(0)40391222
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