camden lindsay, this bug was reported a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ .
If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:
apport-collect -p linux <replace-with-bug-number>
** This bug is no longer a duplicate of bug 935778
Various Toshiba laptops - brightness controls work on first boot, but do
nothing after suspend/resume to RAM.
** Tags added: needs-full-computer-model needs-kernel-logs needs-
suspend-logs needs-upstream-testing
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/606547
Title:
toshiba_acpi no control of display backlight after suspend to ram
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
Hello-
toshiba portege r705
After boot, display backlight control works fine.
After suspend to ram (any number of times), backlight control does not work
After suspend to ram, wake, suspend to disk, wake backlight control returns
to working state.
When control is not working, on screen display does work -- indicating
backlight changing brightness (even though its not)
/proc/acpi/toshiba/lcd changes with button pushes, as expected
/sys/devices/platform/toshiba_acpi/backlight/toshiba/actual_brightness
changes with button pushes, as expected
however--
/sys/devices/platform/toshiba_acpi/backlight/toshiba/brightness never changes
from 0, even from a fresh boot.
Additionally, the max_brightness=7 and the count starts at 0, but there are
only 5 levels when adjusting using control buttons. And even more oddly, when
increasing from 0, display_brightness goes like this:
0,2,4,6,7
And when decreasing from 7, it goes like this:
7,5,3,1,0.
Although i think this needs to be filed against a different component,
(suggestions?) i thought it might be valid here as well.
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