[mythtv-users] 4:3 on LCD with Leadtek 6200
donald at bossung.net
Thu Apr 12 23:29:51 UTC 2007
> On 04/11/2007 06:25 PM, Don Bossung wrote:
> > My mythbox is running Fedora Core 5 x86_64 and myth .20. I installed
> > and updated the machine using Jarrod?s howto and have it running
> > nicely with a Hauppauge 150 tuner. The mythbox is hooked to my olevia
> > 37? lcd tv using vga from the leadtek card.
> > When I setup the machine, I just used the X nvidia driver (nv) and
> > then tweaked xorg.conf using modelines from gtf to get 1368x768 output
> > to the lcd which I was able to fine tune the tv settings and get edge
> > to edge coverage. I have analog cable (time warner) hooked to the
> > pvr150 and when I go into live tv with myth, I get an expected 4:3
> > image with pillars on each side. But I did note that the image was a
> > little fuzzy and when I watched a station with a ticker scroll on the
> > bottom of the screen, the letters would be real fuzzy and hard to read.
> Sounds like you want a higher bitrate...
> > After doing some research here and on google, I decided to use the
> > nvidia driver to try and get some improvements. I downloaded v9755 for
> > x86_64 and installed it. After installation I used nvidia-xconfig and
> > it modified the xorg.conf and all I could really see different was the
> > driver nvidia instead of nv. When I restarted X and went into live tv,
> > the 4:3 image completely filled the screen. Using the W key to scroll
> > through the different aspects, each one still filled the screen just
> > different levels of apparent zoom. Getting back to the aspect ?off?
> > gave the enlarged 4:3 with no side pillars.
> > I have tried various resolutions, display sizes etc, and nothing gives
> > me the ?normal? 4:3 with side pillars. (By the way, I think the image
> > is better, I just don?t want it so LARGE). I have attached a trim
> > downed xorg.conf with no comments if that helps
> NVIDIA's new drivers take a page from Microsoft's, "We can't trust the
> user to tell us what to do," book. They completely ignore the settings
> you provide (i.e. DisplaySize--which is used to specify aspect ratio) if
> the display provides EDID information for the same settings.
> Chances are the panel provides incorrect information which may be
> causing you to run at a "standard" computer resolution (like 1024x768)
> and which causes the driver to report a 4:3 aspect ratio.
Thanks for the quick reply Mike. I don't know what bitrate is but I will
check it out. After posting, I did find your message about calculating the
display size based on 100 dpi from an earlier thread. I calculated the size
based on 100 dpi and that DisplaySize setting did not get a good result.
(Now I know it is because of nvidia lack of playing nice and my panels lack
of accurate EDID info) So, researching startx I found
startx -- -dpi=100 (I think, check the man page)
And this solved the problem. I will look into your suggestion above as well.
FWIW, and future searches, the Olevia LT37HVS _does not_ send out correct
EDID info and that is indeed the cause of the problem. Also, I found that
this panel uses 1360x768 on the vga side so I am going to play with that
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