This associated post
idea-for-pre-installation-test-of-video-driver-t4658.html
was unable to set up a Live-USB diagnosis environment. The following has been done with antiX conventionally installed to a USB flash drive. Kernel=3.7.10-antix.4-amd64-smp.
In an attempt to rule out the ATI/Radeon video driver as the cause of the problem the latest driver was installed via smxi/sgfxi.
Before driver upgrade
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inxi -c 0 -G
Graphics: Card: Advanced Micro Devices [AMD] nee ATI Wrestler [Radeon HD 6320]
X.Org: 1.12.4 drivers: ati,radeon (unloaded: fbdev,vesa) Resolution: 1366x768@60.0hz
GLX Renderer: Gallium 0.4 on AMD PALM GLX Version: 2.1 Mesa 8.0.5
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inxi -c 0 -G
Graphics: Card: Advanced Micro Devices [AMD] nee ATI Wrestler [Radeon HD 6320]
X.Org: 1.12.4 driver: fglrx Resolution: 1366x768@60.0hz
GLX Renderer: AMD Radeon HD 6320 Graphics GLX Version: 4.2.12422 - CPC 13.152
This seems to be a (tentative) pointer that the video driver is not causing the lack of FN key operation.
The laptop seems to have the appropriate apps and no missing dependencies
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apt-cache policy acpid acpi-support
acpid:
Installed: 1:2.0.16-1+deb7u1
Candidate: 1:2.0.16-1+deb7u1
Version table:
*** 1:2.0.16-1+deb7u1 0
500 http://ftp.uk.debian.org/debian/ wheezy/main amd64 Packages
100 /var/lib/dpkg/status
acpi-support:
Installed: 0.140-5
Candidate: 0.140-5
Version table:
*** 0.140-5 0
500 http://ftp.uk.debian.org/debian/ wheezy/main amd64 Packages
100 /var/lib/dpkg/status
Using the same hardware a Tinycore system system was booted from USB flash drive.
The TC system does not use acpi*.
It was tried in two states. Xvesa, i.e. no video driver, and Xorg-7.6 in driverless mode.
In both tests
FN+F6/F7 keys adjusted the screen brightness
FN+F9 toggled the touchpad
Because the above FN keys work in TC but not antiX, I wonder if this is pointing towards the kernel configuration?
In TC using Xorg-7.6
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lsmod | grep -E 'video|key|tosh'
uvcvideo 49152 0
videodev 49152 1 uvcvideo
toshiba_bluetooth 12288 0
sparse_keymap 12288 0
video 16384 0
backlight 12288 1 video
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lsmod | grep -E 'video|key|tosh'
uvcvideo 49152 0
videodev 49152 1 uvcvideo
video 16384 0
toshiba_bluetooth 12288 0
backlight 12288 1 video
sparse_keymap 12288 0
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lsmod | grep -E 'video|key|tosh'
uvcvideo 60232 0
videobuf2_vmalloc 2001 1 uvcvideo
videobuf2_memops 1771 1 videobuf2_vmalloc
videobuf2_core 17937 1 uvcvideo
videodev 85860 2 uvcvideo,videobuf2_core
toshiba_acpi 11833 0
sparse_keymap 2369 1 toshiba_acpi
media 8769 2 uvcvideo,videodev
toshiba_bluetooth 1978 0
rfkill 13311 4 cfg80211,toshiba_acpi,bluetooth
wmi 7228 1 toshiba_acpi
video 10743 0
thermal_sys 12638 2 video,processor