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powerbook G4@1.6Ghz, is there a kernel driver for the LCD ?
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legacy
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PostPosted: Fri May 24, 2013 3:24 pm    Post subject: powerbook G4@1.6Ghz, is there a kernel driver for the LCD ? Reply with quote

hi
i ve got powerbook G4 @ 1.6Ghz, i noticed the LCD is not working well, sometime it becomes dark and i the only solution is to sleep the laptop because resuming it seems to reset the LCD. MacOSX 10.4 is working fine without this issue.

I am running 2.6.26, is this issue still present on modern kernels ?
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JoseJX
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PostPosted: Fri May 31, 2013 6:54 pm    Post subject: Reply with quote

I've never seen this exact problem, but if you use pbbuttonsd, you can adjust the brightness of the screen. This works fine for me, even with modern kernels.
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chithanh
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PostPosted: Fri May 31, 2013 8:55 pm    Post subject: Reply with quote

If it has a radeon chipset, older kernels rely on radeonfb or ACPI (which the ppc doesn't have) to set LCD brightness. Only in recent kernels, the radeon drm supports brightness control.
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legacy
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PostPosted: Fri Jun 14, 2013 2:44 pm    Post subject: Reply with quote

so what kernel do you suggest ?
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gringo
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PostPosted: Thu Jun 20, 2013 1:03 pm    Post subject: Reply with quote

legacy wrote:
so what kernel do you suggest ?


try with latest stable gentoo-sources.
I dont recall ever having a similar problem in my powerbook and yes, it has a r300 (9600) radeon card.

cheers
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legacy
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PostPosted: Sun Jun 30, 2013 9:31 pm    Post subject: Reply with quote

what is the kernel version you are using without the issue i am having with 2.6.26 ?
and could you post the kernel config ?
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blob999
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PostPosted: Tue Jul 02, 2013 1:46 pm    Post subject: Reply with quote

is there a valid reason to use such old kernel ?
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legacy
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PostPosted: Tue Jul 02, 2013 2:21 pm    Post subject: Reply with quote

yes, i have, also is there a valid reason to pass to new kernels which are causing me a lot of troubles about all the usb kernel module staff i have designed ? I do not have the time to re-write/adapt them, not at the present.
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