Stutter / Jitter of GUI scroll text (1 Viewer)


Portal Pro
April 18, 2008
United Kingdom United Kingdom
MediaPortal Version: 1.2.2
MediaPortal Skin: Avalon
Windows Version: Windows 7 x86 SP1
CPU Type: AMD Phenom II X2 555 Black Edition 3.2GHz
HDD: Crucial 64GB RealSSD C300 SSD
Memory: OCZ OCZ3BE1600C8LV4GK PC3-12800 / 1x2GB / 1600MHz / DDR3 / AMD Black Edition XTC Kit
Motherboard: Asus M4A88TD-M EVO/USB3 AMD 880G AM3
Video Card: nVidia MSI GeForce GTX 460 Cyclone 1GB
Video Card Driver: 266.58 WHQL
Sound Card: Realtek High Definition Audio (Optical)
Sound Card AC3: Optical
Sound Card Driver:
1. TV Card: BlackGold BGT3595
1. TV Card Type: Hybrid DVB-S / DVB-T
1. TV Card Driver: 09/03/2010,
2. TV Card:
2. TV Card Type:
2. TV Card Driver:
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: MPC - MPEG-2 Video Decoder (Gabest)
MPEG2 Audio Codec: Microsoft DTV-DVD Audio Decoder
h.264 Video Codec: Microsoft DTV-DVD Video Decoder
Satelite/CableTV Provider: Astra 19.2°E
HTPC Case: Zalman HD-501
Cooling: CPU - Noctua NH-U9B SE2 Dual Fan, Chassis - 2 x Sharkoon 1000
Power Supply: Be Quiet Special Edition White 600W E7 Modular PSU
Remote: Logitech Harmony 300i & Logitech diNovo
TV: LG 60" (LG60PK250)
TV - HTPC Connection: HDMI

I wouldnt normally be too bothered by this, BUT... I did have the GUI scroll text scrolling as smooth as butter - I mean, there was not one single pause, hickup, jitter, stutter or anything, it was perfect super smooth! Now it is not!, about once a second, the scrolling text will briefly pause! I find this sooooooo annoying! lol, especially as it was 100% smooth before :(

The annoying things is, as far as I am aware nothing has changed (hardware or software) from when it was smooth to it now not being smooth.

Screen is at 50Hz, scroll speed is set to 50 FPS and if I do Shift+1 on GUI then it is always reporting between 46-49 FPS. This should really be consistently closer to 50FPS and this is why I am getting the odd pause but its hard for me to determine exactly where the problem lies. It could be hardware, software, drivers or something completely random.

What I have noticed though through trial and error is, if I open the task manager and kill TvService.exe then my text will once again scroll as smooth as butter. This would indicate to me that TvService is sending out frequent broadcasts which in turn get processed by mediaportal, which in turn causes MP to be busy for a few milliseconds and causes the hiccups in scrolling.

Would anyone be able to give me any pointers and possibly advise on nVidia driver settings, ie Force vsync on/off, tripple buffering on/off, number of pre-buffered frames etc...

Thanks for any help.


Portal Pro
April 18, 2008
United Kingdom United Kingdom
Unfortunately not. I didnt get any help here and didnt persue it. I dont really use MediaPortal that much at the moment.


MP Donator
  • Premium Supporter
  • October 26, 2007
    New Zealand New Zealand
    Ok, I had a quick look at this with no success. I'm not sure where you mean to set the rollspeed to 100.

    When I look in Setup, Screen, I see Horizontal Scroll speed and Vertical Scroll speed which have options between 1 and 5.

    The other option is the refresh rate (in FPS). I have tried many different options here but with no success.

    The problem that I have is that the scrolling text seems to scroll for one second, the pause for what appears to be 0.2 of a second and so on. Very frustrating.

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