Upgrading from 2.6.35-25.44 to 2.6.35-27.47 breaks the enable/disable Touchpad hotkey (Fn-F8) on a ThinkPad T510. Under the -25 kernel, the hotkey works as expected to toggle the touchpad on + off. Under the -27 kernel the touchpad does not get toggled on/off.
Using acpi_listen I see that Fn-F8 does send the following event in both the -25 and -27 kernel:
ibm/hotkey HKEY 00000080 00001008
I am using the -pae kernel.
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-27-generic-pae 2.6.35-27.47
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-27.47-generic-pae 2.6.35.11
Uname: Linux 2.6.35-27-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ubuntu 1703 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf2420000 irq 48'
Mixer name : 'Conexant CX20585'
Components : 'HDA:14f15069,17aa218b,00100301'
Controls : 6
Simple ctrls : 4
Card1.Amixer.info:
Card hw:1 'NVidia'/'HDA NVidia at 0xcdefc000 irq 16'
Mixer name : 'Nvidia GPU 0b HDMI/DP'
Components : 'HDA:10de000b,10de0101,00100100'
Controls : 16
Simple ctrls : 4
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 6MHT43WW-1.18'
Mixer name : 'ThinkPad EC 6MHT43WW-1.18'
Components : ''
Controls : 1
Simple ctrls : 1
Card29.Amixer.values:
Simple mixer control 'Console',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Date: Mon Feb 21 13:26:51 2011
HibernationDevice: RESUME=UUID=5a41994b-d1f5-4047-8860-3ab0c7c06a6d
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: LENOVO 434926U
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-27-generic-pae root=UUID=927f3def-3e88-42bb-8619-225eea8ba095 ro quiet splash
ProcEnviron:
LANG=en_US.utf8
SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
dmi.bios.date: 10/26/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6MET81WW (1.41 )
dmi.board.name: 434926U
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr6MET81WW(1.41):bd10/26/2010:svnLENOVO:pn434926U:pvrThinkPadT510:rvnLENOVO:rn434926U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 434926U
dmi.product.version: ThinkPad T510
dmi.sys.vendor: LENOVO
Please test the kernel in
http://
I tested this on a T410 and the FN+F8 disables and enables the touchpad.