linux-kernel - Re: 2.6.30-rc1 (latest git): thinkpad-acpi: cannot control brightness with hotkeys (BISECTED)

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Message-ID: <49E58460.1010402@gmail.com>
Date:	Wed, 15 Apr 2009 08:53:20 +0200
From:	Niel Lambrechts <niel.lambrechts@...il.com>
To:	Zhang Rui <rui.zhang@...el.com>
CC:	Henrique de Moraes Holschuh <hmh@....eng.br>,
	"mjg59@...f.ucam.org" <mjg59@...f.ucam.org>,
	"Zhao, Yakui" <yakui.zhao@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux.kernel" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: Re: 2.6.30-rc1 (latest git): thinkpad-acpi: cannot control	brightness
 with hotkeys (BISECTED)

On 04/15/2009 03:50 AM, Zhang Rui wrote:
> On Wed, 2009-04-15 at 07:59 +0800, Niel Lambrechts wrote:
>   
>> On 04/13/2009 10:34 PM, Henrique de Moraes Holschuh wrote:
>>     
>>> On Mon, 13 Apr 2009, Niel Lambrechts wrote:
>>>   
>>>       
>>>>>> In 2.6.29.1:
>>>>>> lrwxrwxrwx 1 root root 0 Apr 12 20:01 /sys/class/backlight/acpi_video0
>>>>>> -> ../../devices/virtual/backlight/acpi_video0
>>>>>>         
>>>>>>             
>>> Well, that at least confirms that thinkpad-acpi doesn't have anything to
>>> do with your troubles, you were using acpi video.
>>>   
>>>       
>> Okay, I've bisected it to:
>>
>> 74a365b3f354fafc537efa5867deb7a9fadbfe27 is first bad commit
>> commit 74a365b3f354fafc537efa5867deb7a9fadbfe27
>> Author: Matthew Garrett <mjg59@...f.ucam.org>
>> Date:   Thu Mar 19 21:35:39 2009 +0000
>>
>>     ACPI: Populate DIDL before registering ACPI video device on Intel
>>
>>     
>
> please set CONFIG_DRM_I915_KMS, reload the ACPI video driver after
> loading i915 and see if it helps.
>   
In all the kernels I've tried (up to 2.6.30-rc2), I get issues with KMS:

I boot with 'modeset=1 i915=1', console login is okay and 'modprobe i915
modeset=1' seems to work - the console resolution changes (very small
1920x1200).

When I do 'init 5' kdm loads (and display the logon screen) but after
entering my username/password it hangs at the KDE splash-screen (the
last icon, so some progress must have been made). Caps lock then won't
even work, but emergency sync seemed to do the trick.

/var/log/warnings:
Apr 15 07:55:11 linux-7vph nm-dispatcher.action: Script
'/etc/NetworkManager/dispatcher.d/autofs' exited with error status 1.
Apr 15 07:55:12 linux-7vph kernel: allocated 1920x1200 fb: 0x02020000,
bo f598acc0
Apr 15 07:55:12 linux-7vph kernel: Console: switching to colour frame
buffer device 240x75
Apr 15 07:55:13 linux-7vph nm-dispatcher.action: Script
'/etc/NetworkManager/dispatcher.d/nfs' exitedwith error status 6.
Apr 15 07:55:19 linux-7vph kdm_config[3234]: Multiple occurrences of key
'UseTheme' in section [X-*-Greeter] of /usr/share/kde4/config/kdm/kdmrc
Apr 15 07:55:22 linux-7vph kernel: CE: hpet increasing min_delta_ns to
15000 nsec
Apr 15 07:56:10 linux-7vph kernel: Emergency Sync complete
Apr 15 07:56:26 linux-7vph kernel: CE: hpet increasing min_delta_ns to
22500 nsec
Apr 15 07:56:27 linux-7vph kernel: Emergency Sync complete
Apr 15 07:56:49 linux-7vph kernel: Emergency Sync complete
Apr 15 07:56:55 linux-7vph kernel: CE: hpet increasing min_delta_ns to
33750 nsec
Apr 15 07:56:56 linux-7vph kernel: Emergency Sync complete

So while I'd love to use KMS, I have never been able to get X up using it.

Regards,
Niel

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