Acer 1304xc laptop & wrong max cpu frequency

Acer 1304xc laptop
Slackware linux 10.0
Kernel 2.6.8-rc3-mm1

-- dmesg start --
CPU 0 irqstacks, hard=c0422000 soft=c0421000
PID hash table entries: 2048 (order 11: 16384 bytes) Detected 1533.348 MHz processor.
CPU: AMD mobile AMD Athlon(tm) XP 1800+ stepping 00
powernow: PowerNOW! Technology present. Can scale: frequency and voltage.
powernow: No PST tables match this cpuid (0x780)
powernow: This is indicative of a broken BIOS.
powernow: Trying ACPI perflib
powernow: Minimum speed 666 MHz. Maximum speed 1266 MHz. -- dmesg end --

-- /sys/devices/system/cpu/cpu0/cpufreq/ --
mpeh:~% grep ".*" /sys/devices/system/cpu/cpu0/cpufreq/* /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq:1266673 /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq:1266673 /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq:666670 /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies:1266673 1000005 933338 800004 666670 /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors:powersave userspace performance /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq:1266673 /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver:powernow-k7 /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor:userspace /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq:1266673 /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq:666670 /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed:1266673 -- /sys/devices/system/cpu/cpu0/cpufreq/ --

-- /proc/cpuinfo --
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 8
model name : mobile AMD Athlon(tm) XP 1800+
stepping : 0
cpu MHz : 1266.678
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca
cmov pat pse36 mmx fxsr sse syscall mp mmxext 3dnowext 3dnow
bogomips : 2510.66
-- /proc/cpuinfo --

Solution ?

http://nymos.dyndns.org/

On Fri, Aug 06, 2004 at 07:33:33AM +0200, Marijan Peh wrote:

There are two sources of tables we can look for for information on available frequencies. When one looks broken, we fall back to the other.

Your BIOS authors can't read specifications.

Thankfully, they managed to get the ACPI tables right.

Looks fine.

Dave