Thinkpads Forum

Unfortunately my brand-new T60 is affected by the high-pitched noise problem when on battery (http://www.thinkwiki.org/wiki/Problem_w ... tch_noises) as well as the EEPROM problem with the network card (http://www.thinkwiki.org/wiki/Problem_w ... _Not_Valid).

There are work-arounds for both issues, but I also noticed that I get really low voltage readings (see below), which seems odd. What I'd ask you to post is the following:
- Battery status (% remaining)
- Output of the shell command: - Do you have problems with high pitched noise when on battery (with wireless switch on)?

The reason for my request is that my voltage readings appear to be a full volt lower than other readings I've seen posted and I'm wondering whether this might contribute to the problem. Thanks!

BTW: my output is
battery at 33%
$ cat /proc/acpi/battery/BAT0/state | grep present
present: yes
present rate: 22714 mW
present voltage: 11037 mV
I need to issue "# echo 2 > /sys/module/processor/parameters/max_cstate" to get rid of the noise

I also got the high pitched noise when on battery. My numbers are as follows:

Remaining capacity: 95%
present rate: 20831 mW
present voltage: 12261 mV

I have about 1 volt more than you, but still got the noise, which would indicate that the two are not related.

"echo 2 > /sys/module/processor/parameters/max_cstate" solves the noise problem, but it consumes much more energy. Which kinda sucks when on battery

Thanks, piquadrat. That totally disproves my theory ... the issues are obviously uncorrelated.