Ubuntu
linux package

Laptop freeze when changing brightness

Bug #619397 reported by Simon Almström
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Incomplete
Undecided
Unassigned

Bug Description

Binary package hint: udev

I have had lots of problem with freezes of my laptop. This bug report addresses freezes when changing the brightness via the fn buttons.

This is a summary of how I reproduce the problem
Start the computer
Press fn+f7 or fn+f8 [brightness down, brightness up]
Computer freezes
Only way to continue is a hard reset

I am using a HP Compaq Presario CQ61 402E0
I am not using the ATI restricted module although I have an ATI card

Here is a summary of all the fn buttons:
fn-key freeze Working Function
fn+f1 No ? ? [I believe it is help]
fn+f2 No yes print
fn+f3 No ? www
fn+f4 No prints 'p' monitor
fn+f5 No yes* hibernate
fn+f6 No yes lock
fn+f7 Yes No backlight down
fn+f8 Yes No backlight up
fn+f9 No ? play/pause
fn+f10 No ? stop
fn+f11 No ? rewind
fn+f12 No ? fast forward
fn+ins No ? scroll
fn+home No Yes print screen
fn+end No No** sys rq
fn+pgup No ? pause
fn+pgdn No ? break
fn+* [numpad] No Yes mute
fn+- [numpad] No Yes volume down
fn++ [numpad] No Yes volume up

*The backlight is alot lower after revival
** Asked to save screen shot here as well
---
Architecture: amd64
DistroRelease: Ubuntu 10.04
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: Hewlett-Packard Presario CQ61 Notebook PC
Package: udev 151-12
PackageArchitecture: amd64
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-21-generic root=UUID=111fb5cd-69cf-4550-b418-09fa0495c4a0 ro quiet splash
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Tags: lucid
Uname: Linux 2.6.32-21-generic x86_64
UnreportableReason: This is not a genuine Ubuntu package
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 01/25/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.13
dmi.board.name: 363F
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 42.15
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.13:bd01/25/2010:svnHewlett-Packard:pnPresarioCQ61NotebookPC:pvr0491110000200D10000020000:rvnHewlett-Packard:rn363F:rvr42.15:cvnHewlett-Packard:ct10:cvrN/A:
dmi.product.name: Presario CQ61 Notebook PC
dmi.product.version: 0491110000200D10000020000
dmi.sys.vendor: Hewlett-Packard

See original description
Revision history for this message
Simon Almström (simonalmstrom) wrote : BootDmesg.txt

apport information

tags: added: apport-collected
description: updated
Revision history for this message
Simon Almström (simonalmstrom) wrote : CurrentDmesg.txt

apport information

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Simon Almström (simonalmstrom) wrote : Dependencies.txt

apport information

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Simon Almström (simonalmstrom) wrote : Lspci.txt

apport information

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Simon Almström (simonalmstrom) wrote : Lsusb.txt

apport information

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Simon Almström (simonalmstrom) wrote : ProcCpuinfo.txt

apport information

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Simon Almström (simonalmstrom) wrote : ProcInterrupts.txt

apport information

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Simon Almström (simonalmstrom) wrote : ProcModules.txt

apport information

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Simon Almström (simonalmstrom) wrote : UdevDb.txt

apport information

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Simon Almström (simonalmstrom) wrote : UdevLog.txt

apport information

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Simon Almström (simonalmstrom) wrote :

kern_fnf7.log is taken after the laptop rebooted after I pressed fn-f7 (brightness down), freeze and hard reboot.

Revision history for this message
Simon Almström (simonalmstrom) wrote :

kern_fnf8.log is taken after the laptop rebooted after I pressed fn-f8 (brightness up), freeze and hard reboot.

Revision history for this message
Martin Pitt (pitti) wrote :

When it freezes, can you press control-alt-f1 and get to a text terminal? After that, if you press Ctrl-alt-f7 (could also be f8), do you get back to the graphical environment, and does it work again?

Changed in udev (Ubuntu):
status: New → Incomplete
affects: udev (Ubuntu) → linux (Ubuntu)
Revision history for this message
Simon Almström (simonalmstrom) wrote :

"When it freezes, can you press control-alt-f1 and get to a text terminal?" - No. I do not get a text terminal when pressing ctrl-alt-f1. (I have confirmed that this combination works when the laptop is not in frozen)

Revision history for this message
Simon Almström (simonalmstrom) wrote :

I have done a number of additional tests. These tests include starting in recovery mode, starting with the option nomodeset and removing the process gnome-power-manager. Here are the results:

Recovery mode
Blinking cursor half way down the screen - No menu or prompt appear.
Pressing fn-f7
!! Still a freeze when pressing fn-f7

nomodeset + graphical mode
Startup as normal
Press fn+f7
!! No freeze
Screen dim as intended

nomodeset + recovery mode
Startup as normal
In the menu I chose root in prompt
Press fn-f7
!! No freeze
Screen dim as intended

killall gnome-power-manager
Pressing fn-f7
!! Still a freeze when pressing the buttons
Hard reboot required

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