Hi, I am running 2.6.18 kernel (etch) on a DELL D610 laptop. I had many problems with the acpi-cpufreq module which dit not load properly, no easy control on frequency etc... (and much less than one hour working time, plus laptop getting hot - I guess hardware does not like that ! -). I changed to the speedstep-centrino module which works perfectly (p4-clockmod also worked well, but less flexible). I have now more that 2 hours working time on battery, about the same under Windows XP. Regards, JMM
PS : Do you have an additional battery on the XPS ? Can you see it (/proc/acpi/battery/BAT0/info or BAT1)? Ritesh Raj Sarraf a écrit : > On Thursday 13 September 2007, Alexandre Rossi wrote: > >> Is CPU frequency scaling on? If not, this clearly explains it all for me. >> For example, on my laptop : >> $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor >> conservative >> >> > > Yes. It is enabled. I'm using the acpi-cpufreq kernel module. > > [EMAIL PROTECTED]:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor > ondemand > > >> Next is the LCD backlight : is it at the same level in Linux as in >> Windows? I know that on my laptop, I get one extra hour of battery >> time by lowering the LCD brightness to the minimum. >> > > Recently, my LCD backlight got detected as "Set Brightness Controlled". > Earlier, the OS would say that this feature is not supported. But now it can > control the brightness. > Anyway, my testing were done by putting the brightness to low. But still the > same results. > > Will a debug kernel help ? > > Ritesh > -- ------------------------------------------------------------------ Jean-Marie Mouchel Adresse : UMR 7619 - Sisyphe Universite P. et M. Curie Case 105 - Tour 56/46 - 3ieme etage 4 place Jussieu - 75252 Paris Cedex 05 Programme PIREN-Seine : http://www.sisyphe.upmc.fr/internet/piren Tel : +33 (0)1 44 27 51 26 - Fax : +33 (0)1 44 27 51 25 courriel : [EMAIL PROTECTED] bureau : Bureau 404, Tour 56/55, 4ieme etage ------------------------------------------------------------------ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
