Richard Purdie [off-list ref] writes:

On Mon, 2007-02-19 at 00:04 -0800, Andrew Morton wrote:

quoted

On Sun, 18 Feb 2007 23:46:16 -0500 Yaroslav Halchenko [off-list ref] wrote:

quoted

Since the most recent successful for me kernel 2.6.19-rc6-mm1, I've
tried few times to build more recent snapshots and now finally
2.6.20-mm2. In all those cases I have a sad outcome -- kernel boots but
at some point during boot (few moments after Penguin icon in the top left
corner appears), light turns off... I still can see something, especially
if I light a strong flashlight at a sharp angle.

I've enabled back-light support and lcd support for those unsuccessful
kernels (with all backlight support features disabled kernel boots
ok and backlight shines as bright as always)

Is 2.6.20 broken?  I assume the latest 2.6.20-gitN snapshot are failing..

It would be extremely useful to know which kernel versions you tested
and which ones failed. There are a number of backlight changes which are
just in 2.6.20-mm1 and -mm2 which it would be useful to rule out or
identify as the cause.

i have exactly the same problem with 2.6.21-rc1 on a thinkpad t40
with an ati radeon card. the machine boots up but the backlight never
comes on. 2.6.20 worked okay.

--alex--

-- 
| I believe the moment is at hand when, by a paranoiac and active |
|  advance of the mind, it will be possible (simultaneously with  |
|  automatism and other passive states) to systematize confusion  |
|  and thus to help to discredit completely the world of reality. |