Re: X server in dom0: Bad VBT signature

[rudolf <netbsd%eq.cz@localhost>]

Cherry G. Mathew wrote:
> On 31 August 2012 22:45, Pierre Pronchery<khorben%defora.org@localhost>  wrote:
> > On Wed, 29 Aug 2012 01:26:02 +0100, Cherry G. Mathew wrote:
> > > > Pierre Pronchery wrote:
> > > > - http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=46634
> > > > - 
> > > > http://uberwall.org/bin/project/browse/101/UWvbiosdump?file=2FUWvbiosdump.c%2Cv&revision=1.1
> > > > - http://mail-index.netbsd.org/port-xen/2012/04/thread1.html -
> > >
> > > riz@ and I have found the breakage, if you're in a hurry you can try
> > > backing out this commit:
> > > http://mail-index.netbsd.org/source-changes/2011/11/06/msg028702.html
> >
> > I just did, and X starts properly - thanks a lot!
>
> Wondering if anyone can test the following patch:
[...]

I've tried the patch with following results:
  - starting X with vesa driver results in a graphical garbage 
displayed on the screen, where the X should be visible, it is possible 
to switch between this screen and text wscons screens
  - starting X with intel driver results in "Fatal server error: 
Unknown GTT size value: 4e3eff2f" (the number seems to be always the 
same), last related lines from Xorg.0.log:

[   110.905] (II) intel(0): Printing probed modes for output LVDS
[   110.905] (II) intel(0): Modeline "1366x768"x60.0   72.30  1366 1414 
1446 1526  768 771 776 790 (47.4 kHz)
[   110.905] (II) intel(0): I2C device "HDMIDDC_C:ddc2" registered at 
address 0xA0.
[   110.908] (II) intel(0): EDID for output HDMI-2
[   110.908] (II) intel(0): Output VGA connected
[   110.908] (II) intel(0): Output LVDS connected
[   110.908] (II) intel(0): Output HDMI-2 disconnected
[   110.908] (II) intel(0): Using sloppy heuristic for initial modes
[   110.908] (II) intel(0): Output VGA using initial mode 1024x768
[   110.908] (II) intel(0): Output LVDS using initial mode 1366x768
[   110.908] (II) intel(0): Using default gamma of (1.0, 1.0, 1.0) 
unless otherwise stated.
[   111.420] (WW) intel(0): remove MTRR a0000 - b0000
[   111.440]
Fatal server error:
[   111.440] Unknown GTT size value: 4e3eff2f

I've also hit another problem, I don't know, if it is related:
  - dom0 with 512 MB RAM: switching between wscons text screen with 25 
lines and text screen with 50 lines causes immediate panic (display is 
garbled; "blind" sync, ... savecore -n -Z ...: no core dump)
  - dom0 with 6 GB RAM: switching is ok

Kind regards,

r.