[Debian-eeepc-devel] Bug#644445: cpufrequtils: Doesn't find the right kernel module on EeePC 701

[Axel Beckert]

Package: cpufrequtils
Version: 007-2
Severity: minor
User: debian-eeepc-devel at lists.alioth.debian.org
Usertag: 701

By loading all possible cpufreq modules, cpufrequtils 007-1
"accidentially" loaded the right module for my EeePC 701, p4_clockmod.

Before that I wasn't even aware that I can change the CPU frequency of
my EeePC 701 so fine-grained, especially after remembering the 701
issues with SHE (see http://bugs.debian.org/559578).

After the upgrade to cpufrequtils 007-2 and a reboot, these neat
features were gone again. While trying to get cpu frequency scaling back
on my EeePC, I downgraded cpufrequtils to 007-1 and that helped. :-)

So please load p4_clockmod for the following CPU:

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 13
model name	: Intel(R) Celeron(R) M processor          900MHz
stepping	: 8
cpu MHz		: 900.000
cache size	: 512 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 2
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx up bts
bogomips	: 1259.92
clflush size	: 64
cache_alignment	: 64
address sizes	: 32 bits physical, 32 bits virtual
power management:

(Before loading p4_clockmod and running "/etc/init.d/loadcpufreq start"
the "cpu MHz" is usually around 630 MHz which interestingly is no more
available in
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies:
112500 225000 337500 450000 562500 675000 787500 900000)

For myself I've worked around this issue by explicitly stating
FREQDRIVER=p4_clockmod in /etc/default/loadcpufreq.

-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (900, 'testing'), (600, 'stable'), (400, 'oldstable'), (110, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 3.1.0-rc7-686-pae (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages cpufrequtils depends on:
ii  debconf [debconf-2.0]  1.5.41 
ii  libc6                  2.13-21
ii  libcpufreq0            007-2  
ii  lsb-base               3.2-28 

cpufrequtils recommends no packages.

cpufrequtils suggests no packages.

-- debconf information:
  cpufrequtils/enable: true