[Intel-gfx] Black screen on boot with KMS and unable to start X
haroldo.stenger at gmail.com
Wed Mar 17 12:15:42 PDT 2010
Having fighted 48 hours in a row with a very similar configuration,
I'd tell you my tips:
At a point in the configuration-changes line , I had
xf86-video-intel-2.10.0 installed , and X did not start , but show a
lot of errors. I upgraded to 2.10.901 , and X started.
There was an EDID checksum problem in dmesg trail , but that did not
disappear, however, X started working as I said.
The other problem I was fighting , was that I I attached a LCD
monitor, then ctrl alt f1 gave me a "out of range" error. That was
because comething in the KMS thing was not acknowledgeing any of the
/etc/fb.modes settings. If I typed "fbset" to obtain info, the timings
appeared all in 0.
Then I discovered a very magical thing , that enabled VGA , while
keeping KMS , aparently with framebuffer console (fbcon). You have to
put as a boot parameter in lilo or grub an item that reads like :
I also tried
video="VGA-1:1024x768 at 72"
and then I could use the LCD monitor again. The problem wasn't one if
I used a CRT monitor, since it supported the misterious horiz freq KMS
was trying to render.
let me know.
2010/3/17 Scott Silverman <ssilverman at simplexinvestments.com>:
> The fbcon driver is built-in to my kernel, which it seems was not the case
> for your issue. I have looked through the vesafb and uvesafb documentation
> from the kernel, but it is not clear to me how I would use this to configure
> my framebuffer.
> What I do now is pass vga=773 as a kernel arg in grub, which along with
> "nomodesetting" gets me a usable console, but I can not start X with that
> configuration, even disregarding my other X issues.
> 2010/3/17 Andre Müller <andremuellerster at gmail.com>
>> -----BEGIN PGP SIGNED MESSAGE-----
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>> On 03/17/10 17:44, Scott Silverman wrote:
>> > I have an IBM Thinkpad X30 with the Intel Corporation 82830 CGC [Chipset
>> > Graphics Controller] (rev 04).
>> > I am trying to install X with Arch Linux (kernel 2.6.32). I have the
>> > xf86-video-intel v2.10.0-1.
>> > First, without X installed/running, if I boot the machine normally I get
>> > nothing but a blank screen. Same if I set "i915.modeset=1".
>> > Alternatively,
>> > if i use the "nomodesetting" kernel argument I can properly boot and use
>> > the
>> > console.
>> > Output of dmesg when booted with i915.modeset=1:
>> > http://paste.pocoo.org/show/190811/
>> > Xorg.0.log when started (via ssh) with i915.modeset=1:
>> > http://paste.pocoo.org/show/190807/
>> > How can I configure my kernel/xorg so that I can boot and see my
>> > console,
>> > and also have the ability to start X?
>> It may be the problem I once had as well...
>> You need to make shure the framebuffer is enabled and loaded as
>> well (that needs the framebuffer config option but do NOT select
>> any of the framebuffers).
>> The grory details are in
>> and somewhere on this ML.
>> > _______________________________________________
>> > Intel-gfx mailing list
>> > Intel-gfx at lists.freedesktop.org
>> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
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