I was also affected by this bug and I just solved it on my Thinkpad T61 by... blowing 3-4 times into the cooling system!!! Lots of dust escaped so I think my laptop just needs a bit of cleanup ;-) Now bios_limit stays at the highest level even under high load.
I was also affected by this bug and I just solved it on my Thinkpad T61 by... blowing 3-4 times into the cooling system!!! Lots of dust escaped so I think my laptop just needs a bit of cleanup ;-) Now bios_limit stays at the highest level even under high load.
$ cat /sys/devices/ system/ cpu/cpu* /cpufreq/ bios_limit
2201000
2201000