Bug#286084: kernel-source-2.6.8: cpufreq with speedstep-centrino stopped working after once on battery power (Dell Latitide D600)

[Achim Bohnet <ach@mpe.mpg.de>]

Package: kernel-source-2.6.8
Version: 2.6.8-10
Severity: normal

Hi, on a Dell Latitude D600 Pentium-M, cpufreq was
working a very long timewith with the 2.6.8 debian kernels
and cpudynd.  Now (since ~ some weeks)
it stopped working after power is unpluged and reconnect while cpu
uses min. freq. Same in lastest 2.6.{8,9}-1-686.


        Warning: CPU frequency is 1400000, cpufreq assumed 600000


and cpufreq is stick until next reboot at 600 MHz.

correct:
 o with AC after boot --> 600 MHz -> ok
 o start glxgears --> 1400 MHz -> ok
 o unplug AC --> 1400 MHz -> ok
 o plug AC  --> 1400 Mhz -> ok
 o stop glxgears --> 600 Mhz -> ok
 o start glxgears --> 1400 mhz -> ok
 o stop glxgears --> 600 ok
bug:
 o unplug AC again -> 600 ok
 o start glxgears ->  600 <- bug should be 1400.  Syslog:
   Warning: CPU frequency is 1400000, cpufreq assumed 600000
 o plug AC, glxgear still running <- should be 1400


cpudynd (1.0-2) is running as:

 /usr/sbin/cpudynd -i 1 -p 0.5 0.9 -t 120 -h /dev/hda

kill -USR1 or HUP to force cpudyn to use max or dyn. freq. does
not help.  Restarting cpudyn and still min freq. is used when
glxgears is running.

Achim

-- System Information:
Debian Release: 3.1
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.9-1-686
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)

Versions of packages kernel-source-2.6.8 depends on:
ii  binutils                      2.15-5     The GNU assembler, linker and bina
ii  bzip2                         1.0.2-1    A high-quality block-sorting file
ii  coreutils [fileutils]         5.2.1-2    The GNU core utilities
ii  fileutils                     5.2.1-2    The GNU file management utilities

-- no debconf information