Created attachment 66851 [details] dmesg output when radeon.audio=1 I have recently added a HD4670 AGP to one of my older machines, and I am noticing problems with the HDMI audio device. Specifically: irq 17: nobody cared (try booting with the "irqpoll" option) Pid: 0, comm: swapper/0 Not tainted 3.5.3 #2 Call Trace: [<c1063806>] ? __report_bad_irq+0x11/0x94 [<c1063a2d>] ? note_interrupt+0x120/0x19b [<c1062325>] ? handle_irq_event_percpu+0xe8/0xfb [<c1062361>] ? handle_irq_event+0x29/0x40 [<c10640fc>] ? handle_level_irq+0x93/0x93 [<c1064163>] ? handle_fasteoi_irq+0x67/0x90 <IRQ> [<c1003625>] ? do_IRQ+0x2e/0x83 [<c1229829>] ? common_interrupt+0x29/0x30 [<c106007b>] ? audit_update_watch+0x59/0x285 [<c1007479>] ? default_idle+0x23/0x3b [<c1007b38>] ? cpu_idle+0x4b/0x7e [<c1314877>] ? start_kernel+0x2a4/0x2a7 handlers: [<f8575b75>] azx_interrupt [snd_hda_intel] Disabling IRQ #17 This is with radeon.audio=0. With radeon.audio=1, the KMS IRQ has similar problem and is also disabled.
Created attachment 66852 [details] dmesg output when radeon.audio=0
Created attachment 66853 [details] lspci output
According to alsamixer, my HD4670 only has a S/PDIF playback device. However, my HD4890 has both S/PDIF and PCM playback devices. I don't know whether this is significant.
Apparently, the KMS IRQ can fail even when radeon.audio=0. So it looks like the audio IRQ always fails and sometimes takes the KMS IRQ with it - seemingly at random.
"lspci -n" output for the HD4670: 01:00.0 0300: 1002:9495 01:00.1 0403: 1002:aa38
Booting with "irqpoll=1" doesn't fix the problem; it simply no longer happens at boot time: irq 17: nobody cared (try booting with the "irqpoll" option) Pid: 3347, comm: wineserver Not tainted 3.5.3 #2 Call Trace: [<c1063806>] ? __report_bad_irq+0x11/0x94 [<c1063a2d>] ? note_interrupt+0x120/0x19b [<c1062325>] ? handle_irq_event_percpu+0xe8/0xfb [<c1062361>] ? handle_irq_event+0x29/0x40 [<c1064163>] ? handle_fasteoi_irq+0x67/0x90 [<c1003957>] ? handle_irq+0x63/0x70 [<c1003625>] ? do_IRQ+0x2e/0x83 [<c1229829>] ? common_interrupt+0x29/0x30 handlers: [<f8d09b75>] azx_interrupt [snd_hda_intel] Disabling IRQ #17
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