Hi I experience these interrupt underruns on my TDM410P card with the wctdm24xxp driver and bad echo as a result. My motherboard has 2 PCI slots which share an interrupt between them. If I swap this board for a TDM400P using the wctdm driver everything works properly.
I note that wctdm0 registers the interrupt: wctdm0: [FILTER] but, the wctdm24xxp0 doesn't do this, but I can't find where the irq is registered for the wctdm24xxp driver. dahdi: Telephony Interface Registered on major 196 dahdi: Version: 2.4.0-rc5 dahdi_echocan_oslec: Registered echo canceler 'OSLEC' wctdm24xxp0: vendor=d161 device=8005 subvendor=ffffffff wctdm24xxp0: <Wildcard TDM410P> port 0xc000-0xc0ff mem 0xfe921000-0xfe9213ff irq 19 at device 1.0 on pci6 wctdm24xxp0: Port 1: Installed -- AUTO FXO (FCC mode) wctdm24xxp0: Port 2: Installed -- AUTO FXO (FCC mode) wctdm24xxp0: Port 3: Installed -- AUTO FXO (FCC mode) wctdm24xxp0: Port 4: Installed -- AUTO FXO (FCC mode) wctdm24xxp0: Found a Wildcard TDM: Wildcard TDM410P (0 BRI spans, 4 analog channels) dahdi: Registered tone zone 24 (South Africa) wctdm24xxp0: Missed interrupt. Increasing latency to 8 ms in order to compensate. wctdm24xxp0: Host failed to service card interrupt within 128 ms which is a hardunderun. wctdm24xxp0: Host failed to service card interrupt within 128 ms which is a hardunderun. ugen0.2: <Logitech> at usbus0 (disconnected) ums0: at uhub0, port 5, addr 2 (disconnected) wctdm24xxp0: Missed interrupt. Increasing latency to 14 ms in order to compensate. wctdm24xxp0: Missed interrupt. Increasing latency to 20 ms in order to compensate. wctdm24xxp0: ERROR: Unable to service card within 25 ms and unable to further increase latency. wctdm24xxp0: ERROR: Unable to service card within 25 ms and unable to further increase latency. wctdm24xxp0: ERROR: Unable to service card within 25 ms and unable to further increase latency. wctdm24xxp0: Host failed to service card interrupt within 128 ms which is a hardunderun. Ian -- Ian Freislich -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- Asterisk-BSD mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-bsd

