I can confirm essentially the same behavior on my laptop (Intel Atom
N270 @ 1.66GHz) running Jaunty 9.04
$ uname -a
Linux slacy-laptop 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC
2009 i686 GNU/Linux
$ sudo cpufreq-info
cpufrequtils 004: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to cpuf...@lists.linux.org.uk, please.
analyzing CPU 0:
driver: acpi-cpufreq
CPUs which need to switch frequency at the same time: 0
hardware limits: 800 MHz - 1.60 GHz
available frequency steps: 1.60 GHz, 1.33 GHz, 1.07 GHz, 800 MHz
available cpufreq governors: conservative, ondemand, userspace, powersave,
performance
current policy: frequency should be within 800 MHz and 1.60 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 800 MHz (asserted by call to hardware).
cpufreq stats: 1.60 GHz:0.00%, 1.33 GHz:0.00%, 1.07 GHz:0.00%, 800 MHz:0.00%
(38)
analyzing CPU 1:
driver: acpi-cpufreq
CPUs which need to switch frequency at the same time: 1
hardware limits: 800 MHz - 1.60 GHz
available frequency steps: 1.60 GHz, 1.33 GHz, 1.07 GHz, 800 MHz
available cpufreq governors: conservative, ondemand, userspace, powersave,
performance
current policy: frequency should be within 800 MHz and 1.60 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 800 MHz (asserted by call to hardware).
cpufreq stats: 1.60 GHz:0.00%, 1.33 GHz:0.00%, 1.07 GHz:0.00%, 800 MHz:0.00%
(23)
$ lsmod | grep -i cpu
[ no output -- I presume that ACPI & cpufreq have been compiled in to 2.6.28 ]
To be more specific: When the machine boots up, it's using the ondemand
governor. Essentially nothing I can do will make it scale up beyond
800Mhz. I wrote a simple "while(1) i++;" program to load down both
virtual cores, and it still didn't increase the frequency.
Setting the governor to "performance" goes to 1.6GHz, as confirmed by
cpufreq-info, and /proc/cpuinfo
If there's anything more I can do to help, let me know. It's
unfortunate to have to run a laptop in performance mode all the time.
--
ondemand governor does not use maximum frequency under load
https://bugs.launchpad.net/bugs/122993
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
