Intermittent loss of sync and reset

[victorliu]

I'm using gbs-control with a Minimal 64x4, which outputs a non-conforming 640x480@60Hz, with a non-standard number of scanlines. It seems to work "most of the time" at 1280x960, except every minute or so the monitor goes blank and the GBS resets.

The debug message reads:

RGB/HV < > SOG

<reset>
Scanning inputs for sources ...
Activity detected, input: RGB
VSync: present
HSync: presentRGB/HV 
 RGB/HV upscale mode
ADC offset: R:41 G:42 B:40
Active FrameTime Lock enabled, disable if display unstable or stays blank! Method: 0 (vtotal + VSST)

preset applied: 1280x960 for scaling RGB (HV Sync)
Note: scaling RGB is still in development

Print Info gives this:

h: 215 v:1878 PLL:8 A:7b7b7b S:02.1a.20 H-V- I:00 D:0602 m:14 ht:2345 vt: 519 hpw: 293 u:  0 s:76 S:13 W:31

Looking in the sources, this seems to indicate the SOG source is unstable. Is there anything that I should change in the settings to try to address this?

[YoImLee]

Try turning off active frametime lock, or installing a clock generator board and keeping it enabled. RGBHV is known to not work as reliably as RGBs.