Intel 4400 brightness key

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Intel 4400 brightness key

Postby tokumei-74 » 2017-02-12 04:16

I have a DELL 5547 laptop and on Ubuntu the brightness key works by default without any modification, I read Intel drivers are already included by default in the kernel yet the keys do not work on Debian, I tried to search a workaround but returned unsuccessful, is there anyone with a similar configuration able to help me? The laptop also has a AMD VGA but like in Windows its the onboard Intel that control the screen.

thank you for reading.
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Re: Intel 4400 brightness key

Postby phenest » 2017-02-12 19:07

What do you mean by not working? Please elaborate.
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Re: Intel 4400 brightness key

Postby stevepusser » 2017-02-12 22:45

Yet another hardware problem, yet the poster provides nothing about the hardware except the laptop model. :?

Anyhoo, the Google says you have a 4th generation Broadwell chipset, so you should use the backports kernel per this guide: https://forums.bunsenlabs.org/viewtopic.php?id=1185

You will also need non-free firmware for the AMD graphics if you decide to try and get the switchable graphics working with the xorg free radeon driver. The Debian non-free AMD fglrx driver will not build against the backports kernel--I have a patched version that will let the 64-bit version build up to the 4.9 kernel, but the 32-bit will error out.

There are some directions in the Debian wiki that may or may not work with the backported Mesa in jessie-backports: https://wiki.debian.org/AtiHowTo#Hybrid_Graphics
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Re: Intel 4400 brightness key

Postby phenest » 2017-02-13 16:23

stevepusser wrote:... so you should use the backports kernel ...

That's a huge assumption. The OP hasn't even said what version of Debian or Ubuntu they're using/tried.
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Re: Intel 4400 brightness key

Postby stevepusser » 2017-02-13 22:28

I don't think it's that's huge of an assumption; I think it's been well established that the stock Debian 3.16 kernel has poor Broadwell and up support--unless you have any evidence to the contrary?
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Re: Intel 4400 brightness key

Postby phenest » 2017-02-14 09:01

Do you have any evidence that's the kernel they're using?
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Re: Intel 4400 brightness key

Postby stevepusser » 2017-02-14 13:48

I have to assume stock Debian if the poster doesn't say anything...
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Re: Intel 4400 brightness key

Postby Head_on_a_Stick » 2017-02-14 20:52

@OP: which desktop environment are you using?

I have hotkey adjustment for the backlight with my Intel HD4600 with the jessie, jessie-backports and stretch kernels but only if xfce4-power-manager or GNOME shell is running.
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