cpufreq-selector hangs

[klausner]

Binary package hint: gnome-applets

In Unbuntu 9.10, cpufreq-selector hangs from the command line. If I enter something like "cpufreq-selector -c 0 -g ondemand", nothing happens. Literally. The only way to get back to a prompt is to use Ctl-C. The -h option works, but -c, -f, or -g hang if used with valid arguments. If used with invalid arguments, it gives an error message, and then hangs.

[Pedro Villavicencio (pedro)]

Please try to obtain a backtrace of that hang following the instructions at http://wiki.ubuntu.com/DebuggingProgramCrash and upload the backtrace (as an attachment) to the bug report. This will greatly help us in tracking down your problem.

[klausner (klausner)]

Reinstalled:

    * gnome-applets
    * gnome-applets-data
    * libpanel-applets2-0

and solved problem.

[Phillip Susi (psusi)]

Marking as invalid since the user fixed it by reinstalling.

[Sebastien Bacher (seb128)]

don't reopen bugs without a comment

[karatedog (karatedog)]

I can confirm that cpufreq-selector has strange behavior in Ubuntu 10.04.

cpufreq-selector never hangs, it is just very slow if issued this way: 'sudo cpufreq-selector -c 1 -g performance'
I noticed that it takes almost exactly 30 seconds to finish the operation, which is strange.

$ time sudo cpufreq-selector -c 1 -g performance
real 0m30.300s
user 0m0.008s
sys 0m0.004s

$ time sudo cpufreq-selector -c 1 -g performance
real 0m30.252s
user 0m0.004s
sys 0m0.004s

$ time sudo cpufreq-selector -c 1 -g performance
real 0m30.061s
user 0m0.004s
sys 0m0.004s

However if I set SUID on 'cpufreq-selector' and issue: 'cpufreq-selector -c 1 -g performance', it will be lightning fast, tested about 1000 times.

[karatedog (karatedog)]

$ strace cpufreq-selector -c 1 -g performance

......
gettimeofday({1275498260, 793905}, NULL) = 0
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=6, events=POLLIN}], 3, 0) = 0 (Timeout)
gettimeofday({1275498260, 794152}, NULL) = 0
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=6, events=POLLIN}], 3, 0) = 0 (Timeout)
gettimeofday({1275498260, 794270}, NULL) = 0
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=6, events=POLLIN}], 3, 0) = 0 (Timeout)
gettimeofday({1275498260, 794392}, NULL) = 0
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=6, events=POLLIN}], 3, 0) = 0 (Timeout)
gettimeofday({1275498260, 794489}, NULL) = 0
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=6, events=POLLIN}], 3, 0) = 0 (Timeout)
gettimeofday({1275498260, 794562}, NULL) = 0
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=6, events=POLLIN}], 3, 0) = 0 (Timeout)
gettimeofday({1275498260, 794749}, NULL) = 0
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=6, events=POLLIN}], 3, 0) = 0 (Timeout)
gettimeofday({1275498260, 794812}, NULL) = 0
poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}, {fd=6, events=POLLIN}], 3, 30000

Is this that 30 seconds?

[vsespb (vi1tsr)]

I am having same problem, same strace.