Description of problem: powertop crashes with the following message: terminate called after throwing an instance of 'std::ios_base::failure' what(): basic_filebuf::underflow error reading the file Aborted (core dumped) strace shows open("/sys/class/power_supply/BAT0/power_now", O_RDONLY) = -1 ENOENT (No such file or directory) open("/sys/class/power_supply/BAT0/energy_now", O_RDONLY) = -1 ENOENT (No such file or directory) right before the crash, neither of these exist in /sys on my system, but instead there are charge_now, current_now, voltage_now. Version-Release number of selected component (if applicable): powertop-2.0-2.fc17.x86_64 kernel-3.4.0-1.fc17.x86_64 How reproducible: Every time Steps to Reproduce: 1. Run powertop on a laptop 2. 3. Actual results: powertop crashes and dumps core Expected results: powertop launches Additional info:
I have the same problem but on my laptop powertop works fine when it's on AC power. So I think powertop crashes only when laptop is on battery power. I'm using the same version of powertop but my kernel is kernel-3.4.2-4.fc17.x86_64.
Could you try the following experimental build? http://koji.fedoraproject.org/koji/taskinfo?taskID=4216033 Please let me know whether it helps.
So, I have tried it on my laptop and it works fine. Calibracion has also ended successfully and powertop is running without errors. thank you
*** Bug 835682 has been marked as a duplicate of this bug. ***
Thanks for testing, pushing the update.
powertop-2.0-3.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/powertop-2.0-3.fc17
powertop-2.0-3.fc16 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/powertop-2.0-3.fc16
Package powertop-2.0-3.fc17: * should fix your issue, * was pushed to the Fedora 17 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing powertop-2.0-3.fc17' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-10273/powertop-2.0-3.fc17 then log in and leave karma (feedback).
powertop-2.0-3.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.
powertop-2.0-3.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report.