Bug 719137

Summary: Dell laptop may freeze while pressing keys to adjust backlight
Product: [Fedora] Fedora Reporter: Jose Alonso <joalonsof>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 15CC: gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-07-11 13:48:55 EDT Type: ---
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Description Jose Alonso 2011-07-05 16:45:25 EDT
Description of problem:
Pressing the keys to adjust the brightness of a dell laptop sometimes
freeze de machine, specially if you keep the key pressed.
Dell Inspiron R15 N5010 (i5)

Version-Release number of selected component (if applicable):
last fedora 15

How reproducible:
I think the problem is with the kernel module dell-laptop.

The following script freezes the machine:

for (( i=1 ; i <= 100; i++))
    echo 3 >/sys/devices/virtual/backlight/acpi_video0/brightness

Steps to Reproduce:
Actual results:

Expected results:

Additional info:
Comment 1 Josh Boyer 2011-10-20 21:18:11 EDT
Are you still seeing this with the 2.6.40.x kernel updates in F15?
Comment 2 Jose Alonso 2011-10-21 10:35:50 EDT
Yes with kernels 2.6.40.x (F15) and also development kernels v3.0 v3.1-rc.
I also report these problem with more details in:
but the site is down.
Comment 3 Josh Boyer 2012-06-06 11:48:39 EDT
Is this still happening with 2.6.43/3.3?
Comment 4 Josh Boyer 2012-07-11 13:48:55 EDT
Fedora 15 has reached it's end of life as of June 26, 2012.  As a result, we will not be fixing any remaining bugs found in Fedora 15.

In the event that you have upgraded to a newer release and the bug you reported is still present, please reopen the bug and set the version field to the newest release you have encountered the issue with.  Before doing so, please ensure you are testing the latest kernel update in that release and attach any new and relevant information you may have gathered.

Thank you for taking the time to file a report.  We hope newer versions of Fedora suit your needs.