Created attachment 158361 [details] pci configuration of hardware I added the ADDI-DATA Card to my configuration to play with comedi. 07:05.0 Unassigned class [ff00]: Applied Micro Circuits Corp. APCI1500 Signal processing controller (16 dig. inputs + 16 dig. outputs) Kernel driver in use: addi_apci_1500 Kernel modules: addi_apci_1500 Now the dmesg log get spammed with the following messages: --- [10308.023276] addi_apci_1500 0000:07:05.0: Interrupt from unknown source [10308.127282] addi_apci_1500 0000:07:05.0: Interrupt from unknown source [10308.143233] addi_apci_1500 0000:07:05.0: Interrupt from unknown source [10308.407128] addi_apci_1500 0000:07:05.0: Interrupt from unknown source [10308.479084] addi_apci_1500 0000:07:05.0: Interrupt from unknown source [10308.495051] addi_apci_1500 0000:07:05.0: Interrupt from unknown source [10308.583024] addi_apci_1500 0000:07:05.0: Interrupt from unknown source [10308.662986] addi_apci_1500 0000:07:05.0: Interrupt from unknown source [10308.678949] addi_apci_1500 0000:07:05.0: Interrupt from unknown source [10308.734944] addi_apci_1500 0000:07:05.0: Interrupt from unknown source [10308.790911] addi_apci_1500 0000:07:05.0: Interrupt from unknown source [10308.806878] addi_apci_1500 0000:07:05.0: Interrupt from unknown source [10308.958822] addi_apci_1500 0000:07:05.0: Interrupt from unknown source ---- Right now there is absolutly no application running which would access the /dev/comedi0 device file.
Created attachment 158371 [details] Kernel config
Created attachment 160101 [details] Patch to fix bogus shared IRQ spewage
Please let me know if that fixes your problem.
Hello Alan, Thank you! This patch applied on v3.18 did solve the issue. Georg