Arch Linux

funny

Member

Registered: 2008-01-28

Posts: 44

Re: [solved]Problem after fresh instalation[/solved]

Yes. I tried it. I tried adding i915 without and then with .modeset=1

MisterAnderson

Member

Registered: 2011-09-04

Posts: 285

Re: [solved]Problem after fresh instalation[/solved]

I have an old pentium III laptop (I got it free, thought I'd play with it) where the LCD switches off completely during KMS load, so I'm running it with nomodeset. I tried using X but it can't seem to find the proper resolution with vesa (it's 1440x1050) so I think it's a problem with the new intel drivers on the older hardware.

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funny

Member

Registered: 2008-01-28

Posts: 44

Re: [solved]Problem after fresh instalation[/solved]

I have only
10-evdev.conf  10-quirks.conf  10-synaptics.conf

at my /etc/X11/xorg.conf.d/

ajbibb

Member

Registered: 2012-02-12

Posts: 142

Re: [solved]Problem after fresh instalation[/solved]

I think I found the problem, or at least the problem at my end.  Seems that we can't find a screen using the latest xf86-video-intel-2.20.9-2 driver.  No problems with any version up to this point.  Try adding the following kernel line:

drm_kms_helper.edid_firmware=edid/1024x768.bin

My old Dell laptop will now boot using the 2.20.9-2 driver.  You should also remove any nomodeset or vga= lines. 

The above line disables probing of the monitor and specifies the monitor data directly to the kernel.  I got this from: http://www.osadl.org/Single-View.111+M5 … fd1.0.html

According to the document in the link it is possible to specify other resolutions, only downside is you must know your monitor capabilities up front.

EDIT: Well this is embarrassing, but this doesn't actually work either.  The drm_kms_helper kernel module is built in to the Arch kernel, but the firmware needed (EDID) does not seem to exist in the Arch repos.  Adding this line to the kernel throws an error at boot, but the error scrolls by real fast and I missed it last night.  With the error you fall back to your second best video driver, which is VESA on my system.  Further research is needed, but I feel that I'm on the right track.

Last edited by ajbibb (2012-10-17 00:54:25)

Glinx

Member

Registered: 2010-10-12

Posts: 34

Re: [solved]Problem after fresh instalation[/solved]

Is this a back light problem or the screen turns off completly?
I remember my acer laptop needing to use the setpci cmd durrring boot to keep the back light turned on ie:  setpci -s 00:02.0 F4.B=10

https://wiki.archlinux.org/index.php/Backlight

MisterAnderson

Member

Registered: 2011-09-04

Posts: 285

Re: [solved]Problem after fresh instalation[/solved]

If it's the same as mine it's not a backlight problem.

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funny

Member

Registered: 2008-01-28

Posts: 44

Re: [solved]Problem after fresh instalation[/solved]

It isnt a backlight problem. It is KMS problem.

MisterAnderson

Member

Registered: 2011-09-04

Posts: 285

Re: [solved]Problem after fresh instalation[/solved]

The old laptop has died (lucky it was free and just for messing with) so I can't help anymore. Sorry

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funny

Member

Registered: 2008-01-28

Posts: 44

Re: [solved]Problem after fresh instalation[/solved]

After today update (new kernel and  new intel driver) it is ok. I can use internal monitor.

sebcactus

Member

From: Germany

Registered: 2005-01-27

Posts: 277

Re: [solved]Problem after fresh instalation[/solved]

Hi funny.
I have the same pb as yours on my dell laptop.
Could you tell me what settings you are finally using (e.g. i915.conf, kernel line, etc.)?

funny

Member

Registered: 2008-01-28

Posts: 44

Re: [solved]Problem after fresh instalation[/solved]

Hi sebcactus.
Finnaly I have

LABEL arch
        MENU LABEL Arch Linux
        LINUX ../vmlinuz-linux
        APPEND root=/dev/sda3 ro
        INITRD ../initramfs-linux.img

at /boot/syslinux/syslinux.cfg

MODULES="i915 intel_agp"

at /etc/mkinitcpio.conf

and no i915 or intel_agp at /etc/modules-load.d/

sebcactus

Member

From: Germany

Registered: 2005-01-27

Posts: 277

Re: [solved]Problem after fresh instalation[/solved]

Great! Thank you. Looks like I had to remove intel_agp and i915 from the initramfs (mkinitcpio.conf), which is the opposite

Last edited by sebcactus (2012-11-08 09:14:44)