Sony tx brightness keys doesn't work anymore in edgy

[unggnu]

Sony tx brightness keys doesn't work anymore in edgy. They work fine in Dapper and as I remember at first in edgy but now it doesn't work anymore.
The problem is that the relevant file /etc/acpi/sonybright.sh hasn't changed since dapper so it seems that the keys aren't recognized anymore or the daemon which calls sonybright.sh ignores them.
The TX series need /proc/acpi/sony/brightness to change brightness which works fine if I do it on my own.

[unggnu (unggnu)]

Maybe it is a Kernel issue. It was initiated in Dapper. As well in Dapper as in Edgy brightness keys aren't shown in xev nor in dmesg but at least they work in Dapper.

[unggnu (unggnu)]

It is still annoying but I have found/made a workaround. I have changed the permissions of /proc/acpi/sony/brightness with "chmod 666 /proc/acpi/sony/brightness" so that every user can change brightness. This has to be done on every start so /etc/rc.local is a good place for it. If there are security concerns a special group could be created but most times laptops are single user systems.
However, after changing the permissions brightness could be changed through user with the script /etc/acpi/sonybright.sh and the parameter "up" or "down".
E.g. I have defined an input action for key combination ctrl+alt+up or down.

[unggnu (unggnu)]

It is definitely a kernel issue since it works with my self compiled kernel but not with the standard 386 one. I haven't tested it with the generic but I think it has the same problem.

[unggnu (unggnu)]

After installing the latest updates it works fine with the standard kernel too. Don't know what was the reason but it works.