Australia
Yes - that is most likely the cause!
No - Australia is PAL 50Hz. But, I run my beamer at 75Hz for that very reason.
Try 75 or 100 Hz, if these are supported by your beamer?
D
dm15644
Guest
- Thread starter
- #12
Catalyst offers 50 Hz and 60 Hz at 1280x720. But in
Windows -> Display Properties -> Advanced -> Video card properties -> Show video modes
there's only 1280x720@60 listed.
My beamer's manual says that any FPS in the range from 50 Hz to 100 Hz is supported. The video card manual doesn't list the supported modes at all, but anyway this all makes me belive that my video card is the limiting factor.
Actually it's not the card hardware, because I can set 50Hz, but this setting is then eventually always overruled and set to 60 Hz. Seems like a limitiation of the WDM really. Unfortunately I have no clue how to tweak this file.
75 Hz is apparently not supported. What card model do you have? I have an MSI Radeon 9550 SE TD128. It's cooled passively, so maybe it runs a bit slower than other cards.
Thanks for your support
jayorck
Windows -> Display Properties -> Advanced -> Video card properties -> Show video modes
there's only 1280x720@60 listed.
My beamer's manual says that any FPS in the range from 50 Hz to 100 Hz is supported. The video card manual doesn't list the supported modes at all, but anyway this all makes me belive that my video card is the limiting factor.
Actually it's not the card hardware, because I can set 50Hz, but this setting is then eventually always overruled and set to 60 Hz. Seems like a limitiation of the WDM really. Unfortunately I have no clue how to tweak this file.
75 Hz is apparently not supported. What card model do you have? I have an MSI Radeon 9550 SE TD128. It's cooled passively, so maybe it runs a bit slower than other cards.
Thanks for your support
jayorck
I still think that you should update the Catalyst drivers - the latest available are 6.12, and there is a good chance that will fix the 50Hz issue ... 
Also, you might consider the Omega drivers, or trying PowerStrip. Here's a PowerStrip forum article about refresh rate fixes.
BTW, I am using a passivly cooled 9550, so you should be getting the same results as me - but I am on a much later Catalyst version.
Also, you might consider the Omega drivers, or trying PowerStrip. Here's a PowerStrip forum article about refresh rate fixes.
BTW, I am using a passivly cooled 9550, so you should be getting the same results as me - but I am on a much later Catalyst version.
D
dm15644
Guest
- Thread starter
- #15
Here's how I got 50 Hz and even 75 Hz as options in Catalyst:
- First, apply this registry hack: http://support.ati.com/ics/support/KBAnswer.asp?questionID=22853
- Then, reinstall Catalyst.
I have to set 50 Hz, otherwise my beamer does not show the image correctly.
This still didn't completely remove the sutttering, so I changed the PCI latency again to 32 as you suggested. Now it seems to work fine, as far as I can tell from watching movies for 20 minutes.
Will post again if I run into further problems. Thank you very much for your support.
/jayorck
- First, apply this registry hack: http://support.ati.com/ics/support/KBAnswer.asp?questionID=22853
- Then, reinstall Catalyst.
I have to set 50 Hz, otherwise my beamer does not show the image correctly.
This still didn't completely remove the sutttering, so I changed the PCI latency again to 32 as you suggested. Now it seems to work fine, as far as I can tell from watching movies for 20 minutes.
Will post again if I run into further problems. Thank you very much for your support.
/jayorck
Have a look at the tool and the information reference https://forum.team-mediaportal.com/showthread.php?t=14570.
It shows the overall latency of the system in graphical form. With it and the PCI latency tool I found that it was a network card that was causing my latency problems.
It shows the overall latency of the system in graphical form. With it and the PCI latency tool I found that it was a network card that was causing my latency problems.
D
dm15644
Guest
- Thread starter
- #17
Thanks, I'll try it!
/jayrock
/jayrock
D
dm15644
Guest
- Thread starter
- #18
Still not solved, unfortunately.....
With movies and DVD I still get problems. Every few minutes I get stutter, then the "jitter" values jump by say 20. But, no frames drop. It's like the video stops for a moment and then catches up again with audio.
I briefly checkd the omega drivers, no improvement. With Powerstrip I made bas experiences earlier, therefore I'm a bit reluctant to test it.
DPCLAT also didn't reveal any news, the PCI latency is around 70 us. I've checked for unusual events for about an hour, but the maximum was 1400 us only while running MP. Pretty high though.... I've tried to disable Ethernet, unused devides, etc, but no success.
I have also tested Reclock which also didn't help. I starting to abandon the idea that it is a sync problem. The "!" jitter figure, does that indicate the data is not reaching the video card in time? Any more ideas how I can figure out the cause for this?
Thank you very much for your help
/jayrock
With movies and DVD I still get problems. Every few minutes I get stutter, then the "jitter" values jump by say 20. But, no frames drop. It's like the video stops for a moment and then catches up again with audio.
I briefly checkd the omega drivers, no improvement. With Powerstrip I made bas experiences earlier, therefore I'm a bit reluctant to test it.
DPCLAT also didn't reveal any news, the PCI latency is around 70 us. I've checked for unusual events for about an hour, but the maximum was 1400 us only while running MP. Pretty high though.... I've tried to disable Ethernet, unused devides, etc, but no success.
I have also tested Reclock which also didn't help. I starting to abandon the idea that it is a sync problem. The "!" jitter figure, does that indicate the data is not reaching the video card in time? Any more ideas how I can figure out the cause for this?
Thank you very much for your help
/jayrock
D
dm15644
Guest
- Thread starter
- #19
Hi everybody,
I figured that the jitter is minimized when I put the PCI latency for the video card to 0 and for the TV card to 255 (the maximum). It's still there, but it's only one or two frames that are hanging. Most interestingly, the jitter is completely gone when I manually deactivate EPG over DVB-T for all channels in Settings/TV/DVT-T EPG.
Usually, my system comes to a short halt when the TV card is switched on in the TV menu. Is the TV card switched on an off when grabbing the EPG from DVB-T? If yes, then this would explain the last bit of stutter.
And if so, is there a way to control the EPG-over-DVB-T grabber, e.g. in such a way that it's doesn't work in the background? Or, alternatively, that it's activated eg. only once per day? I think I can live with one stutter event per day......
Cheers
/jayorck
I figured that the jitter is minimized when I put the PCI latency for the video card to 0 and for the TV card to 255 (the maximum). It's still there, but it's only one or two frames that are hanging. Most interestingly, the jitter is completely gone when I manually deactivate EPG over DVB-T for all channels in Settings/TV/DVT-T EPG.
Usually, my system comes to a short halt when the TV card is switched on in the TV menu. Is the TV card switched on an off when grabbing the EPG from DVB-T? If yes, then this would explain the last bit of stutter.
And if so, is there a way to control the EPG-over-DVB-T grabber, e.g. in such a way that it's doesn't work in the background? Or, alternatively, that it's activated eg. only once per day? I think I can live with one stutter event per day......
Cheers
/jayorck
Oh, yes - I forgot about that one ...
I have permanently disabled EPG over DVB-T for the same reason ... I got unacceptable jitter when it was enabled.