I've got a fresh install of Debian Wheezy Beta 4 on this Dell Precision M4600 laptop. This is the net install version. I'm working through a set of problems that others might want to know about.
On the system, as originally installed, the cpu frequency scaling monitors show the CPU frequency is stuck at 800MHZ. I'm using the XFCE4 CPU Frequency Scaling monitor applet, which has always worked very well. "ondemand" is the performance profile. That should be sufficient. But the cpus are locked. I've seen this before on this in Debian Squeeze. There are a lot of moving parts involved in fixing this. I'm not sure what is the bare minimum, and while trying to fix it, I experimented with various settings. If I were starting this from scratch, or telling you what to do, I would try the fixes in this order. 1. Simplest. Suppose your setup is good, but the settings are bad. My install had impossibly high scaling thresholds. As root, check it: #cat /sys/devices/system/cpu/cpufreq/up_threshold 95 Holy cow. No wonder the frequency is locked at 800mhz. Manually re-setting that to something more reasonable: # echo -n 60 > /sys/devices/system/cpu/cpufreq/up_threshold I expect that may work. I did not try it first, before that I tried this. Now, how to make that permanent? $ apt-get install sysfsutils In /etc/sysfs.conf I put: mode devices/system/cpu/cpufreq/ondemand = 644 ##devices/system/cpu/cpufreq/ondemand/freq_step = 10 devices/system/cpu/cpufreq/ondemand/up_threshold = 45 devices/system/cpu/cpufreq/ondemand/ignore_nice_load = 1 devices/system/cpu/cpufreq/ondemand/sampling_down_factor = 10 I DOUBT that will work if you don't already have cpufrequtils installed. In case you don't, follow step 2. 2. Install & configure cpufrequtils. See http://wiki.debian.org/HowTo/CpuFrequencyScaling cpufrequtils should have been installed by default, but on my pc it was not with Wheezy Beta 4. I copied the configuration file I had set up from the other system # cat /etc/default/cpufrequtils ENABLE="true" GOVERNOR="ondemand" MAX_SPEED="2710000" MIN_SPEED="800000" Those 2 steps solve the problem for me. However, while testing, I did explore idea that the kernel itself is the trouble. 3. Get a newer kernel from Debian Experimental. This was necessary in Debian Squeeze and Wheezy before. I do not think it is necessary now, but the kernel-3.2 supplied with Wheezy Beta 4 gives off a lot of warnings on my system. So I tried 3.7 from Debian experimental. I'll keep comparing. The 3.2 kernel lacked some stuff that was required to us the enterprise wireless, but 3.5 did have that, and I'm hoping either or both work when I try them later. pj -- Paul E. Johnson Professor, Political Science Assoc. Director 1541 Lilac Lane, Room 504 Center for Research Methods University of Kansas University of Kansas http://pj.freefaculty.org http://quant.ku.edu -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/CAErODj_rR015KT_Q8FRcvZ07=7w87+fa51n3o+10+oeob_6...@mail.gmail.com
