>-----Original Message----- >From: Brice Goglin [mailto:[EMAIL PROTECTED] >Sent: Friday, January 20, 2006 8:24 PM >To: Pallipadi, Venkatesh >Cc: Brown, Len; GregR; [email protected] >Subject: Re: 2.6.15-mm2 (acpi-cpufreq not loading) > >Pallipadi, Venkatesh wrote: > >>Can you try whether speedstep-centrino driver loads? >>You can select both acpi-cpufreq and speedstep-centrino in config and >>they will be loaded in proper order at boot time. >> >> >Yes, speedstep-centrino works. I'll be happy to keep using it since it >seems to provide the same features. But, both are supposed to >work here, >right ? >By the way, do you think I should update my BIOS ? My Thinkpad T43 has >been updated two month ago but there's a new update available. >
Good to know. BIOS is supposed to support either one or both of them, but as long as one of them works it should be fine. Technically, those two should have been a single driver and OS should use speedstep-centrino mechanism first, if that fails then should fall back to acpi-cpufreq. But, they are different drivers for historical reasons. Probably we can provide a single config option that selects both the drivers automatically. Speedstep-centrino is preferrable and better than acpi-cpufreq. It does a faster frequency transition. So, don't worry about upgrading the BIOS due to this failure. In general, it is always better to update the BIOS whenever a upgrade is available though. Thanks, Venki - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
