[Intel-gfx] Issues with 2nd display being treated as primary (when not plugged in)

[Bryan Hoyt | Brush Technology]

Also, here's my dmesg from booting the 2.6.38 kernel, in case it's useful to
help someone find out more about the issue: http://pastebin.com/qgqd6iT4

<http://pastebin.com/qgqd6iT4> - Bryan

On Thu, Jan 27, 2011 at 21:34, Bryan Hoyt | Brush Technology <
bryan at brush.co.nz> wrote:

> Hello,
>
> I have an all-in-one tablet-like PC with a builtin monitor (LVDS1) and 2nd
> hotpluggable monitor (VGA1), using the intel graphics driver.
>
> My problem in a few words: if I don't have a 2nd screen plugged in at boot,
> I can't see a thing once X loads. If I have a 2nd screen plugged in at boot,
> everything works more-or-less ok.
>
> Details of unit:
>
>    - Xorg: 1.7.6
>    - Linux: 2.6.32-27-generic (and I've also tried with the very latest
>    2.6.38 Ubuntu Natty Narwhal kernel, same problem)
>    - Ubuntu: 10.04 Lucid Lynx
>    - Graphics card: Intel Mobile 945GM/GMS/GME, 943/940GML Express
>    Integrated Graphics Controller (rev 03)
>    - Unit: Axiomtek     GOT-5100T-830    All-in-One    10.4” SVGA TFT
>    Fanless Touch Panel Computer with Intel® AtomTM N270 Processor Onboard
>
>
> More detail: If I have VGA1 unplugged at boot, X detects it (VGA1) as
> primary for some reason, and shows a blank screen on LVDS1 (but during BIOS
> load, grub, and plymouth splash, the picture shows on LVDS1 as expected. I'd
> expect X to do the same, but it doesn't). When I plug in VGA1, the picture
> shows up fine on there, but no pic on LVDS1 until I load up Monitor
> Preferences or use xrandr. If VGA1 is plugged in during boot, then both
> screens operate as expected.
>
> I want it to boot smoothly, with no flicker, in both situations (2nd screen
> plugged & unplugged), so using xrandr dynamically after X loads isn't really
> an option.
>
>    - Xorg.conf: none (I've tried various xorg.conf settings, but none
>    help, so it works just as badly with no config file)
>    - lspci: http://pastebin.com/n6bPhupW
>    - xrandr --verbose: http://pastebin.com/0gmRWARM
>    - Xorg.log withOUT 2nd monitor attached: http://pastebin.com/J9adGpjb<http://pastebin.com/pyx5y2g0>
>    - Xorg.log WITH 2nd monitor attached: http://pastebin.com/wP1VEvHJ
>
> <http://pastebin.com/n6bPhupW>
>  <http://pastebin.com/pyx5y2g0>
> Can anyone help me delve further into the problem? Perhaps even help fix
> it? ;-)
>
> I'd be very keen to chat with someone in person (Skype or something), if
> that's appropriate -- but I'm more than happy to discuss via this list if
> that's better.
>
> Kind regards,
> Bryan
>
> --
> PS. Check out the Brush newsletter: *Subscribe or read our previous
> newsletters* <http://brush.co.nz/newsletters>
>
> Bryan Hoyt, *Web Development Manager*  --  Brush Technology
> *Ph:* +64 3 741 1204     *Mobile:* +64 21 238 7955
> *Web:* brush.co.nz
>



-- 
PS. Check out the Brush newsletter: *Subscribe or read our previous
newsletters* <http://brush.co.nz/newsletters>

Bryan Hoyt, *Web Development Manager*  --  Brush Technology
*Ph:* +64 3 741 1204     *Mobile:* +64 21 238 7955
*Web:* brush.co.nz
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