[mythtvnz] VDPAU package can be removed?
Dylan Hall
dylan at deedums.com
Fri May 8 01:01:37 BST 2009
On Fri, 2009-05-08 at 11:02 +1200, Aaron Drysdale wrote:
> Because I get a small amount of tearing and judder while watching TV
> in myth. I originally thought it might have started when I turned on
> deinterlacing, but someone here said that this is most often
> associated with a mismatch between the source video fps and monitor
> refresh rate (at least that is what I took out of it.)
>
>
>
> Since we use 25 fps with PAL TV, then my understanding is that I would
> get a smoother video if I could run the TV at 50Hz. Do you not have
> that problem? As a test this morning, I turned off deinterlacing, but
> I still had the slight tearing so I assumed it must be a refresh rate
> problem.
>
I don't get any issues like that, but the vast majority of the content I
watch is .mkv and .avi files with US origins, so if anything, I probably
benefit from the 60Hz default. What little TV I do watch is SD captured
from an analogue source so tends to look fairly rubbish at the best of
times.
It might also be worth noting that I use Freevo which uses mplayer for
all the playback.
>
>
> Currently I am just letting the OS select the preferred timing as
> well, and it is running at 1360x768 @ 60.01 Hz.
>
>
>
> I notice the EDID info you posted doesn’t show any other timings? I
> thought this TV would at least support 50Hz. Why is that not shown?
>
I'm curious myself, it seems unlikely that those are the only two modes
supported. While reading about the CustomEDID stuff mentioned by
Jean-Yves I can across this post
(http://www.nvnews.net/vbulletin/showthread.php?t=126648) that talks
about using "gtf" to generate mode lines, e.g.
> gtf 1360 768 50
# 1360x768 @ 50.00 Hz (GTF) hsync: 39.55 kHz; pclk: 69.61 MHz
Modeline "1360x768_50.00" 69.61 1360 1416 1560 1760 768 769 772 791
-HSync +Vsync
No idea if the above works, but might be worth a try. Read the rest of
the post at the link above, there are a bunch of other settings required
to force the use of the custom mode line.
Dylan
>
>
> Thanks
>
> Aaron
>
>
>
>
> From:mythtvnz-bounces at lists.linuxnut.co.nz
> [mailto:mythtvnz-bounces at lists.linuxnut.co.nz] On Behalf Of Dylan Hall
> Sent: Friday, 8 May 2009 10:25
> To: MythTV in NZ
> Subject: Re: [mythtvnz] VDPAU package can be removed?
>
>
>
>
>
> I have the same TV and I don't use any mode lines to drive it, I just
> let the driver figure it out for itself. The only caveat is that the
> TV needs to be switched on and connected if you reboot so that the
> video card can probe the TV when X starts.
>
> I've extracted the edid data with "get-edid" and attached the results.
>
> Running that through "parse-edid" it generates the following:
>
> parse-edid: parse-edid version 1.4.2
> parse-edid: EDID checksum passed.
>
> # EDID version 1 revision 3
> Section "Monitor"
> # Block type: 2:0 3:fc
> Identifier "SONY TV"
> VendorName "SNY"
> ModelName "SONY TV"
> # Block type: 2:0 3:fc
> # Block type: 2:0 3:fd
> HorizSync 14-68
> VertRefresh 48-62
> # Max dot clock (video bandwidth) 150 MHz
> # DPMS capabilities: Active off:no Suspend:no Standby:no
>
> Mode "1360x768" # vfreq 60.015Hz, hfreq 47.712kHz
> DotClock 85.500000
> HTimings 1360 1424 1536 1792
> VTimings 768 771 777 795
> Flags "+HSync" "+VSync"
> EndMode
> Mode "1280x720" # vfreq 60.000Hz, hfreq 45.000kHz
> DotClock 74.250000
> HTimings 1280 1390 1430 1650
> VTimings 720 725 730 750
> Flags "-HSync" "-VSync"
> EndMode
> # Block type: 2:0 3:fc
> # Block type: 2:0 3:fd
> EndSection
>
>
> I assume the 1360x768 at 60 mode above is the one the driver figures out
> for itself. It doesn't look like the panel is reporting a 50Hz mode.
>
> I'm curious, why do you need/want 50Hz?
>
> Dylan
>
>
> On Fri, 2009-05-08 at 09:37 +1200, Aaron Drysdale wrote:
>
>
>
> Thanks for that. So I've now disabled Dynamic Twin View in my xorg.conf
> file, and sure enough in the Xrandr gui the 50 51 52 Hz has disappeared.
> However all it reports now is 60Hz. So I assume this is where I need to
> start coming up with custom modelines to get it to run at 50Hz.
>
> Unfortunately, my TV is "HD ready" - so it doesn't support 1080p and
> there I can't use your xorg.conf. I'm running it at the native panel
> resolution of 1360x768 and want to get it running at 50Hz. By the way,
> if anyone already has figured out the modelines for a Sony Bravia
> 40V300A then I would greatly appreciate hearing from you.
>
> Does it sound like I'm on the right track?
>
> Aaron
> -----Original Message-----
> From: mythtvnz-bounces at lists.linuxnut.co.nz
> [mailto:mythtvnz-bounces at lists.linuxnut.co.nz] On Behalf Of Jean-Yves
> Avenard
> Sent: Thursday, 7 May 2009 22:32
> To: MythTV in NZ
> Subject: Re: [mythtvnz] VDPAU package can be removed?
>
> Hi
>
> 2009/5/7 Aaron Drysdale <Aaron.Drysdale at provencocadmus.com>:
> > I turned off GPU Scaling in the nVidia xserver settings. This got rid
> of the 50 51 52 Hz refresh rates, however now the only refresh rates
> that show up are 60Hz. How can I figure out what the available refrsh
> rates and timings are, so I can put the correct timings in xorg.conf?
>
> No GPU scaling can't make 50,51 and 52 disappeared. It only prevent
> the refresh being always 60Hz no matter what you choose.
>
> For what timing to use if you want to set it manually, refer to my
> previous post... There's a link to a xorg.conf that works perfectly
> with Sony TV
>
> >
> > You talk about the nvidia-settings program - is this a command line
> util that returns the timings from the EDID? Is there some other way of
> getting the timings from the EDID of my tv?
>
> no
>
> nvidia-settings let you play with the driver configuration. It comes
> with the nvidia driver packages... And should be automatically
> installed.
> If not, the package name is nvidia-settings :)
>
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