> FWIW, these are exactly the symptoms I had on a SIS chipset with a budget > card. These cards appear to be very timing sensitive. The parameters to > play with are the SAA7146A "FIFO threshold" and "PCI burst length" > settings. Settings I found to work well: > > 1. PCI burst = 32 DWORDs, FIFO threshold = 32 DWORDs - This one handles > even a 40Mbps DVB-Cable stream on both i440BX as well as i850E chipsets > (don't have others to try). > > 2. PCI burst = 16 DWORDs, FIFO threshold = 16 DWORDs - seems to work > equally well. > > 3. PCI burst = 16 DWORDs, FIFO threshold = 32 DWORDs - The only setting > which allowed me to make a DVB-T budget card work on a SIS 651 chipset. >
Well, optimism is ebbing now. I haven't completely finished trying everything, but I don't seem to be making much difference with these options. Can I just check I'm applying them right: Basically as per: http://www.linuxtv.org/mailinglists/linux-dvb/2003/07-2003/msg00171.html I change av7110.c and change the line: saa7146_write(saa->mem, PCI_BT_V1, 0x001c0000) to either 0x00170000 or 0x00130000 for options 1 and 2 (I did also try changing all the other registers to something lower as well.) Then make clean, make, make insmod and off we go. I have completely disabled all the onboard devices, especially the usb bus, and still I have glitches on channel 5 for example. On many other channels I can get the quality to be "pretty good". However, the sound is WAY out of sync, nearly 1 sec or so behind. This all works fine with the full featured card though, and sound is going to an RME audio 96/8 card I have a few things to try still, but just wanted to check that I'm altering the param correctly because I don't really see much change when I move it around... ...Also, one other strange thing. I have not yet tried adding the debug flag, but I do notice that the frontend does not load up properly unless the ves1820 module is insmod first.... Any idea why? Thanks Ed W -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe linux-dvb" as subject.
