[mythtv-users] [OT] 1080i

[Bryan Murphy]

Andrew Gallatin wrote:
> Perhaps X is rejecting your desired modes, and falling back to
> the next available standard mode which it likes.   Did you
> check your log in /var/log/Xorg.0.log for lines like
> "not using mode " pertaining to your mode?

Yes, actually I do have these entries:

(II) NVIDIA(0): Not using mode "1280x720" (no mode of this name)
(II) NVIDIA(0): Not using default mode "1024x768" (width too large for 
virtual size)
(II) NVIDIA(0): Not using default mode "800x600" (width too large for 
virtual size)
(WW) NVIDIA(0): Not using mode "720x480":
(WW) NVIDIA(0):   horizontal blanking width ((max(858,798) - min(720,736) =
(WW) NVIDIA(0):      138) not a multiple of 8
(WW) NVIDIA(0):   horizontal sync width (798 - 736 = 62) not a multiple of 8
(WW) NVIDIA(0):   horizontal frame length (858) not a multiple of 8
(**) NVIDIA(0): Validated modes for display device DFP-0:
(**) NVIDIA(0):      Default mode "640x480": 25.2 MHz, 31.5 kHz, 60.0 Hz
(**) NVIDIA(0):      Default mode "512x384": 32.5 MHz, 48.4 kHz, 60.0 Hz (D)
(**) NVIDIA(0):      Default mode "400x300": 20.0 MHz, 37.9 kHz, 60.3 Hz (D)
(**) NVIDIA(0):      Default mode "320x240": 12.6 MHz, 31.5 kHz, 60.1 Hz (D)

I'm running this remotely, so I can't actually see it, but xvidtune is 
telling me it's running at 640x480 right now:

GetModeLine - scrn: 0 clock: 25200
GetModeLine - hdsp: 640 hbeg: 656 hend: 752 httl: 800
               vdsp: 480 vbeg: 490 vend: 492 vttl: 525 flags: 10

I'm guessing that the sync width not being a multiple of 8 is my main 
culrpit right now.  I'll try tweaking that a bit and get back to the 
list with my results.  Thanks for pointing those entries out.  Just 
knowing where to look in the first place is half the battle!

>>#  Option   "TVStandard" "HD720p"
>>   Option   "TVStandard" "HD1080i"
>>   Option   "TVOverscan" "0.0"
> I wasn't aware that TVStandard or TVOverscan worked via Nvidia DVI.
> I thought that was a tv-out sort of thing only.  Do they do anything?

No, they don't do anything.  Nor do I have any overscan option when 
using nvidia-settings.  That's just a legacy setting hanging around from 
my older S-VIDEO configurations. :)

Bryan