On Friday, April 05, 2013 09:59:12, Sean Dague wrote:
> On 04/05/2013 09:42 AM, Chris Knadle wrote:
> > On Friday, April 05, 2013 06:53:14, Sean Dague wrote:
> >> On 04/04/2013 07:38 PM, Chris Knadle wrote:
> >>> Briefly spoke with Sean about this last night.
> >>>
> >>> I've got this maddening NVIDIA driver problem; the IBM LCD screen for
> >>> this 15.4" Phillips LP154W02-TL06 has an EDID that is SNAFU such the
> >>> newer Nvidia driver (which checks the EDID) will only allow going to
> >>> 1600x1050 mode. This then causes problems trying to do TwinView
> >>> between monitors (or using a projector) whenever the other monitor
> >>> doesn't support this resolution -- which naturally is always the case.
> >>>
> >>> I've tried using these options in xorg.conf:
> >>> Option "UseEDID" "False"
> >>> Option "UseEdidFreqs" "DFP-0:False"
> >>>
> >>> ... but when I use these, starting Xorg causes Xorg to hang, and the
> >>> screen to go black. Restarting X doesn't help -- never comes back.
> >>>
> >>> If someone else has gone through this and thinks they might know of a
> >>> fix (however doubtful it may be), please email this thread. I've put
> >>> a lot of effort into this, and right now I'm down to making a custom
> >>> EDID file by hand based on known Modelines, and it's a rediculous job.
> >>
> >> The following is what my Device section looks like for my laptop (using
> >> an nvidia card):
> >>
> >> Section "Device"
> >>
> >> Identifier "Device0"
> >> Driver "nvidia"
> >> VendorName "NVIDIA Corporation"
> >> Option "RegistryDwords" "EnableBrightnessControl=1"
> >> Option "ModeValidation" "AllowNonEdidModes"
> >>
> >> EndSection
> >>
> >> The "ModeValidation" "AllowNonEdidModes" is the thing that makes the
> >> nvidia driver give up negotiating Edid, and just give you a default list
> >> which lets you select all kinds of things.
> >
> > Wow. Yep, that did it! Thanks... this is a relief. :)
> >
> > Using this setting causes fonts to be rendered at different sizes than
> > before, but I don't care -- I think I know how to figure that part out.
> > The option is mentioned in the README.txt.gz for the
> > nvidia-kernel-source package, but it's much more obscure. I'm glad I
> > asked... I might not have found it.
>
> Yeh, I think it will then no longer compute DPI from the monitor, so you
> have to set it yourself in your window manager tools (otherwise it jumps
> back to the arcane default of 72dpi). 96 is typically a good value.
Option "DPI" "96 x 96"
Yep, that does wonders. Cool. Thanks much!
-- Chris
--
Chris Knadle
[email protected]
_______________________________________________
Mid-Hudson Valley Linux Users Group http://mhvlug.org
http://mhvlug.org/cgi-bin/mailman/listinfo/mhvlug
Upcoming Meetings (6pm - 8pm) Vassar College
Feb 6 - Raspberry Pi
Mar 6 - 10th Anniversary Meeting - Linux where you least expect it
Apr 3 - Typography: Physical Art to Digital Art
