You are not logged in.

#1 2012-09-05 01:24:31

lowly
Member
Registered: 2012-09-05
Posts: 4

[SOLVED] Xorg not loading (backlight control interface error)

After installing Arch on my Thinkpad Edge 14 everything works out of the box except Xorg.

# grep EE /var/log/Xorg.o.log wrote:

[ 126.836]  (EE)  intel(0): unrecognized backlight control interface (null)

- backlight control interface which is located at /sys/class/backlight/intel_backlight
But the server still tries to use acpi_video0


gentoo wiki for lenovo thinkpad edge wrote:

Ensure CONFIG_DRM and CONFIG_DRM_I915 are set in your kernel config, and install xf86-video-intel (or set VIDEO_CARDS="intel" in /etc/make.conf) to get X.org to recognise the video card.

I did # pacman -S xf86-video-intel
I'm not sure how to do the other stuff...  (noob)


Would appreciate any help,
lowly


p.s. I also have some font warnings in the same log file, but hopefully that's trivial.

Last edited by lowly (2012-09-06 13:51:53)

Offline

#2 2012-09-05 01:39:53

mrunion
Member
From: Jonesborough, TN
Registered: 2007-01-26
Posts: 1,571
Website

Re: [SOLVED] Xorg not loading (backlight control interface error)

The HP g6's and g7's needed the following added to the kernel line to work:

acpi_osi=Linux acpi_backlight=vendor

I was getting the same message as you as I was building my new laptop yesterday. The "unrecognized backlight control" was fixed with the above additions. YMMV since it's not an HP, but it might be a start.

Also, I had NO xorg.conf or ANYTHING set. I just added i915 and intel_agp to the modules line as directed in the Wiki article no Intel cards.


Matt

"It is very difficult to educate the educated."

Offline

#3 2012-09-05 02:08:54

lowly
Member
Registered: 2012-09-05
Posts: 4

Re: [SOLVED] Xorg not loading (backlight control interface error)

Where exactly do i put 'acpi_osi=Linux acpi_backlight=vendor'?
I'm using syslinux

Edit: just typed it into the command line.  Nothing happend so i assume that's it.  Still same error after reboot.


I just did the following according to the wiki.

Added the following to /etc/mkinitcpio.conf: wrote:

MODULES="i915 intel_agp"

then,

# mkinitcpio -p linux

then reboot.

Still same error.

Last edited by lowly (2012-09-05 02:36:10)

Offline

#4 2012-09-05 03:16:22

lowly
Member
Registered: 2012-09-05
Posts: 4

Re: [SOLVED] Xorg not loading (backlight control interface error)

//message not needed

Last edited by lowly (2012-09-06 13:56:12)

Offline

#5 2012-09-05 20:06:01

Leonid.I
Member
From: Aethyr
Registered: 2009-03-22
Posts: 948

Re: [SOLVED] Xorg not loading (backlight control interface error)

lowly wrote:

After installing Arch on my Thinkpad Edge 14 everything works out of the box except Xorg.

# grep EE /var/log/Xorg.o.log wrote:

[ 126.836]  (EE)  intel(0): unrecognized backlight control interface (null)

- backlight control interface which is located at /sys/class/backlight/intel_backlight
But the server still tries to use acpi_video0

Please see http://cgit.freedesktop.org/xorg/driver … af71b985ed and man 4 intel. Basically, the error seems to be spurious  as it only means that no user-defined backlight is found. This is a new feature in xf86-video-intel 2.20.6 (before there was no such error). To summarize, regarding the backlight, you don't have to do anything. It is not the reason why your Xorg doesn't work...

lowly wrote:
gentoo wiki for lenovo thinkpad edge wrote:

Ensure CONFIG_DRM and CONFIG_DRM_I915 are set in your kernel config, and install xf86-video-intel (or set VIDEO_CARDS="intel" in /etc/make.conf) to get X.org to recognise the video card.

I did # pacman -S xf86-video-intel
I'm not sure how to do the other stuff...  (noob)


Would appreciate any help,
lowly


p.s. I also have some font warnings in the same log file, but hopefully that's trivial.

Those are irrelevant. Post your Xorg.0.log and output of startx when it fails.


Arch Linux is more than just GNU/Linux -- it's an adventure

Offline

#6 2012-09-06 02:27:39

lowly
Member
Registered: 2012-09-05
Posts: 4

Re: [SOLVED] Xorg not loading (backlight control interface error)

Fixed it!. smile
Thanks Leonid.I for the direction.

# startx wrote:

/etc/X11/xinit/xinitrc: line 52: twm: command not found
/etc/X11/xinit/xinitrc: line 53: xclock: command not found
/etc/X11/xinit/xinitrc: line 54: xterm: command not found
/etc/X11/xinit/xinitrc: line 56: exec: xterm: not found
xinit: connection to X server lost
/etc/X11/xinit/xinitrc: line 55: xterm: command not found

waiting for X server to shut down Server terminated successfully (0). Closing log file.

Xorg.0.log wrote:

... blah font errors boring ...
(WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
(WW) Falling back to old probe method for vesa
(WW) Falling back to old probe method for fbdev

I fixed the ACPI error with this thread.

As for the others, well I installed xterm & xclock:
#pacman -S xterm
and
#pacman -S xorg-xclock

smile I like this...

Offline

Board footer

Powered by FluxBB