Bug 832497 - powertop crashes on launch due to /sys differences for BAT0
powertop crashes on launch due to /sys differences for BAT0
Product: Fedora
Classification: Fedora
Component: powertop (Show other bugs)
x86_64 Linux
unspecified Severity high
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Assigned To: Jaroslav Škarvada
Fedora Extras Quality Assurance
: 835682 (view as bug list)
Depends On:
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Reported: 2012-06-15 10:43 EDT by Alex Chernyakhovsky
Modified: 2012-07-14 18:00 EDT (History)
4 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2012-07-14 17:50:12 EDT
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Alex Chernyakhovsky 2012-06-15 10:43:11 EDT
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):

How reproducible:
Every time

Steps to Reproduce:
1. Run powertop on a laptop
Actual results:
powertop crashes and dumps core

Expected results:
powertop launches

Additional info:
Comment 1 Lukas Vrabec 2012-06-19 10:50:20 EDT
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.
Comment 2 Jaroslav Škarvada 2012-07-03 09:18:40 EDT
Could you try the following experimental build?

Please let me know whether it helps.
Comment 3 Lukas Vrabec 2012-07-03 14:50:16 EDT
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
Comment 4 Jaroslav Škarvada 2012-07-04 04:04:20 EDT
*** Bug 835682 has been marked as a duplicate of this bug. ***
Comment 5 Jaroslav Škarvada 2012-07-04 04:12:22 EDT
Thanks for testing, pushing the update.
Comment 6 Fedora Update System 2012-07-04 04:29:05 EDT
powertop-2.0-3.fc17 has been submitted as an update for Fedora 17.
Comment 7 Fedora Update System 2012-07-04 04:29:20 EDT
powertop-2.0-3.fc16 has been submitted as an update for Fedora 16.
Comment 8 Fedora Update System 2012-07-05 19:34:22 EDT
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:
then log in and leave karma (feedback).
Comment 9 Fedora Update System 2012-07-14 17:50:12 EDT
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.
Comment 10 Fedora Update System 2012-07-14 18:00:15 EDT
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.

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