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From: Dmitriy Geels <dmitriy.geels@gmail.com>
Date: Wed, 10 Jun 2009 11:14:57 +0400
Message-ID: <78f5d6bf0906100014r5b7f5c14p4544ef13442c8f0b@mail.gmail.com>
Subject: Re: Apple Bluetooth devices: Battery level?
To: Bastien Nocera <hadess@hadess.net>
Cc: Jiri Kosina <jkosina@suse.cz>, linux-bluetooth@vger.kernel.org,
	linux-input <linux-input@vger.kernel.org>
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Sender: linux-input-owner@vger.kernel.org
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Hi!

Kernel rebuilding is pretty easy, for ubuntu/debian it would be:
- sudo apt-get install linux-source build-essential
- tar xf /usr/src/linux-source*
- cd linux-source-`uname -r`
- cp /boot/config-`uname -r` .config
- make menuconfig (find and enable HID_DEBUG)
- make bzImage modules deb-pkg
Then after some time you will get deb package, which you need to
install and then run:
- sudo update-initramfs -c -k 'new kernel version'
- sudo update-grub

Then you can reboot into new kernel and use "echo 2 >
/sys/modules/hid/parameters/debug" instead of debug module parameter.

2009/6/10 Bastien Nocera <hadess@hadess.net>:
> I found that for pretty much all the input problems, I'd need to do
> something like that. Problem is:
> - enabling CONFIG_HID_DEBUG requires rebuilding the kernel
> - most distributions build hid into the kernel
>
> Wouldn't there be a way to enable the debug at run-time without
> impacting too much on performance or binary size?