Screen brightness buttons no longer work

[Neal Bartrip]

Having just updated my Hardy wubi installation to Intrepid Beta on my Toshiba Tecra M2.

The buttons to adjust the screen brightness (fn + F5,F6) which used to work in Hardy no longer have any effect.

[Ian Weisser (ian-weisser)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately we can't fix it without more information.

Please include the following additional information, if you have not already done so (pay attention to lspci's additional options), as required by the Ubuntu Kernel Team:
1. Please include the output of the command "uname -a" in your next response. It should be one, long line of text which includes the exact kernel version you're running, as well as the CPU architecture.
2. Please run the command "dmesg > dmesg.log" after a fresh boot and attach the resulting file "dmesg.log" to this bug report.
3. Please run the command "sudo lspci -vvnn > lspci-vvnn.log" and attach the resulting file "lspci-vvnn.log" to this bug report.

For your reference, the full description of procedures for kernel-related bug reports is available at https://wiki.ubuntu.com/KernelTeamBugPolicies Thanks in advance!

[Alan Pater (alan-pater)]

Same issue on this Toshiba A50. It appears that kernel 2.6.27 does not include the needed modules.

$ sudo modprobe acpi_toshiba
FATAL: Module acpi_toshiba not found.

$ uname -a
Linux goo 2.6.27-7-generic #1 SMP Fri Oct 24 06:42:44 UTC 2008 i686 GNU/Linux

$ cat config-2.6.27-7-generic | grep TOSHIBA
# CONFIG_ACPI_TOSHIBA is not set
# CONFIG_TOSHIBA is not set

Earlier kernels did include the modules.

$ cat config-2.6.24-19-generic | grep TOSHIBA
CONFIG_ACPI_TOSHIBA=m
CONFIG_TOSHIBA=m

[Alan Pater (alan-pater)]

Tested on own hardware, found issue caused by module not being built.

[Alan Pater (alan-pater)]

Ah: https://wiki.ubuntu.com/IntrepidReleaseNotes#Toshiba%20laptop%20hotkey%20support

Looks like a fix will be coming through at a later date. toshiba_acpi was replaced by tlsup which does not have hotkey support.