I move this to "won't fix" for Intrepid as that release is too old to
justify a backport effort.
** Description changed:
+ SRU justification:
+
+ Impact: After I carelessly pulled in some updates to the ACPI video
+ code, we were faced with some regressions. One was (at least) a certain
+ Acer laptop model that suddenly had no backlight control.
+
+ Fix: As the ACPI BIOS is broken on a way that only the *wrong* graphics
+ definition will be accepted by acpi-video as the right definition lacks
+ an attribute to be considered, the fix is to have less strict
+ requirements to that check, so the definition for the right graphics
+ device gets accepted (a patch doing that unconditionally, has been
+ submitted upstream and has been acked, but might not make it until
+ 2.6.32). For the stable tree I created more code which makes sure the
+ less strict tests only take effect on that laptop or when the user
+ really wants to.
+
+ Testcase: Booting on another laptop will not activate the code (which
+ prints a "Using less strict video detection..." message) but will do
+ with "acpi_video_strict_detect=0". In both cases nothing bad happened.
+ The affected laptop boots and selects the new check which gives back the
+ backlight control.
+
+ ---
+
Since the 2.6.27-11 generic kernel (also in 2.6.27-12) I cannot change
the backlight brightness anymore. In the latest kernel, it seems there's
no more file in /proc/acpi/video, but GFX0 still apears in 2.6.27-9
where I can still change brightness. I'm new to linux so if you need
information give me the command to run. It's an acer 6920G laptop.
** Changed in: linux (Ubuntu Intrepid)
Status: Fix Committed => Won't Fix
--
Acer: Cannot change brightness with 2.6.27-11+ kernel
https://bugs.launchpad.net/bugs/333386
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