roberto wrote: > hello > unfortunately, i encountered a bad problem in my laptop (Dell Latitude > D600) very frequent on these models: > sometimes, the BIOS does not recognize the ac adapter and this > seriously prevents the system performance: the CPU works at 600MHz > (instead of 2000MHz); if the battery is not at 100% then the ac > adapter cannot recharge it and so on... > > now, since the current can flow inside the pc i'd like to tell Debian > to force the CPU working at full speed, without concerns about the > adapter > > i post here this output since it may be helpful: > > ~$ cat /proc/acpi/processor/CPU0/power > active state: C2 > default state: C1 > bus master activity: ffffffff > states: > C1: promotion[C2] demotion[--] latency[000] usage[00198990] > *C2: promotion[C3] demotion[C1] latency[050] usage[01315600] > C3: promotion[--] demotion[C2] latency[050] usage[00000000] > > > thank you very much > -- > roberto > OS: GNU/Linux, Debian > > Hey Roberto Best would be doing a bios upgrade, if a newer version is available. > ~$ cat /proc/acpi/processor/CPU0/power > active state: C2 > ... to change this state (this is probably your question), do this: $ su # echo 1 > /proc/acpi/processor/CPU0/power The echo-command with the ">" does not work with sudo (or I do not know better), so you actually have to be root. Please note that "/proc/acpi/processor/CPU1/throttling" would also be interesting for you. But still a bios upgrade would be the better solution. Best regards, Benjamin Schmidt
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