Hi,
here's the output of "lspci -tvv":
# lspci -tvv
-+-[0000:ff]-+-08.0 Intel Corporation Xeon E5/Core i7 QPI Link 0
| +-08.3 Intel Corporation Xeon E5/Core i7 QPI Link Reut 0
| +-08.4 Intel Corporation Xeon E5/Core i7 QPI Link Reut 0
| +-09.0 Intel Corporation Xeon E5/Core i7 QPI Link 1
| +-09.3 Intel Corporation Xeon E5/Core i7 QPI Link Reut 1
| +-09.4 Intel Corporation Xeon E5/Core i7 QPI Link Reut 1
| +-0a.0 Intel Corporation Xeon E5/Core i7 Power Control Unit 0
| +-0a.1 Intel Corporation Xeon E5/Core i7 Power Control Unit 1
| +-0a.2 Intel Corporation Xeon E5/Core i7 Power Control Unit 2
| +-0a.3 Intel Corporation Xeon E5/Core i7 Power Control Unit 3
| +-0b.0 Intel Corporation Xeon E5/Core i7 Interrupt Control Registers
| +-0b.3 Intel Corporation Xeon E5/Core i7 Semaphore and Scratchpad Configuration Registers
| +-0c.0 Intel Corporation Xeon E5/Core i7 Unicast Register 0
| +-0c.1 Intel Corporation Xeon E5/Core i7 Unicast Register 0
| +-0c.2 Intel Corporation Xeon E5/Core i7 Unicast Register 0
| +-0c.6 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller System Address Decoder 0
| +-0c.7 Intel Corporation Xeon E5/Core i7 System Address Decoder
| +-0d.0 Intel Corporation Xeon E5/Core i7 Unicast Register 0
| +-0d.1 Intel Corporation Xeon E5/Core i7 Unicast Register 0
| +-0d.2 Intel Corporation Xeon E5/Core i7 Unicast Register 0
| +-0d.6 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller System Address Decoder 1
| +-0e.0 Intel Corporation Xeon E5/Core i7 Processor Home Agent
| +-0e.1 Intel Corporation Xeon E5/Core i7 Processor Home Agent Performance Monitoring
| +-0f.0 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Registers
| +-0f.1 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller RAS Registers
| +-0f.2 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 0
| +-0f.3 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 1
| +-0f.4 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 2
| +-0f.5 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 3
| +-0f.6 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 4
| +-10.0 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 0
| +-10.1 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 1
| +-10.2 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 0
| +-10.3 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 1
| +-10.4 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 2
| +-10.5 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 3
| +-10.6 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 2
| +-10.7 Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 3
| +-11.0 Intel Corporation Xeon E5/Core i7 DDRIO
| +-13.0 Intel Corporation Xeon E5/Core i7 R2PCIe
| +-13.1 Intel Corporation Xeon E5/Core i7 Ring to PCI Express Performance Monitor
| +-13.4 Intel Corporation Xeon E5/Core i7 QuickPath Interconnect Agent Ring Registers
| +-13.5 Intel Corporation Xeon E5/Core i7 Ring to QuickPath Interconnect Link 0 Performance Monitor
| \-13.6 Intel Corporation Xeon E5/Core i7 Ring to QuickPath Interconnect Link 1 Performance Monitor
\-[0000:00]-+-00.0 Intel Corporation Xeon E5/Core i7 DMI2
+-01.0-[01]--
+-02.0-[02]--+-00.0 Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590]
| \-00.1 Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590]
+-03.0-[03-04]----00.0-[04]----04.0 C-Media Electronics Inc CMI8788 [Oxygen HD Audio]
+-04.0 Intel Corporation Xeon E5/Core i7 DMA Channel 0
+-04.1 Intel Corporation Xeon E5/Core i7 DMA Channel 1
+-04.2 Intel Corporation Xeon E5/Core i7 DMA Channel 2
+-04.3 Intel Corporation Xeon E5/Core i7 DMA Channel 3
+-04.4 Intel Corporation Xeon E5/Core i7 DMA Channel 4
+-04.5 Intel Corporation Xeon E5/Core i7 DMA Channel 5
+-04.6 Intel Corporation Xeon E5/Core i7 DMA Channel 6
+-04.7 Intel Corporation Xeon E5/Core i7 DMA Channel 7
+-05.0 Intel Corporation Xeon E5/Core i7 Address Map, VTd_Misc, System Management
+-05.2 Intel Corporation Xeon E5/Core i7 Control Status and Global Errors
+-05.4 Intel Corporation Xeon E5/Core i7 I/O APIC
+-11.0-[05]--
+-16.0 Intel Corporation C600/X79 series chipset MEI Controller #1
+-19.0 Intel Corporation 82579V Gigabit Network Connection
+-1a.0 Intel Corporation C600/X79 series chipset USB2 Enhanced Host Controller #2
+-1c.0-[06]----00.0 Marvell Technology Group Ltd. 88SE9172 SATA 6Gb/s Controller
+-1c.1-[07]----00.0 Marvell Technology Group Ltd. 88SE9172 SATA 6Gb/s Controller
+-1c.2-[08]----00.0 Marvell Technology Group Ltd. 88SE9172 SATA 6Gb/s Controller
+-1c.3-[09]----00.0 Conexant Systems, Inc. CX23885 PCI Video and Audio Decoder
+-1c.5-[0a]----00.0 Fresco Logic FL1009 USB 3.0 Host Controller
+-1c.6-[0b]----00.0 Fresco Logic FL1009 USB 3.0 Host Controller
+-1d.0 Intel Corporation C600/X79 series chipset USB2 Enhanced Host Controller #1
+-1e.0-[0c]----00.0 Philips Semiconductors SAA7146
+-1f.0 Intel Corporation C600/X79 series chipset LPC Controller
+-1f.2 Intel Corporation C600/X79 series chipset 6-Port SATA AHCI Controller
\-1f.3 Intel Corporation C600/X79 series chipset SMBus Host Controller
For testing I've also removed both DVB cards, however, the problem persists.
I've also put the sound card in different PCI-E slots: It works (generates interrupts, flawless playback) in the PCI-E slots that are connected to the chipset (IRQ 19, not shared), however, it doesn't work in any of the PCI-E slots that are connected to the processor (always IRQ 16, always shared). Unfortunately it's not a solution to put the sound card in the PCI-E slots that are connected to the chipset as these are already blocked...
Thanks for your help,
Matthias
> Gesendet: Mittwoch, 14. Oktober 2020 um 14:14 Uhr
> Von: "Clemens Ladisch via Alsa-user" <alsa-user@xxxxxxxxxxxxxxxxxxxxx>
> An: alsa-user@xxxxxxxxxxxxxxxxxxxxx
> Betreff: Re: Xonar D2X: Playback only when other devices generate interrupts
>
> Matthias Leofeine wrote:
> > Playback is interrupted (only short pieces of sound are played/repeated)
> > or I've got no sound at all; applications log message: "underrun
> > occurred".
>
> This sounds like the ASM1083 problem, but that affected only PCI cards.
> The PCI/PCIe bridge on the D2X card is not known to have such problems.
>
> Please show the output of "lspci -tvv".
>
>
> Regards,
> Clemens
>
>
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