Hi, I'm sorry for your inconvenience. If you have ever used your device with Pipewire, I would like to see your experiences how it works, since both servers uses the different ways to handle ALSA PCM device in respect to no-period-wakeup mode.. On Tue, Sep 02, 2025 at 03:11:52PM +0500, Илья Кузнецов wrote: > ________________________________ > > Hello ALSA developers, > > I would like to report a reproducible issue with snd-fireface on Linux > kernels 6.10 through 6.17-rc2. > > ________________________________ > > System Information > > Kernel versions tested: 6.10 → 6.17-rc2 > > Audio interface: RME Fireface 800 > > Driver in use: snd-fireface > > Audio server: JACK (tested with jackd and QJackCtl) > > Distribution: Debian 12 > > Kernel config: ALSA FireWire drivers enabled, no FFADO in use > > Chip 1394: Texas Instrumets > > ________________________________ > > Steps to Reproduce > > Boot kernel 6.10 … 6.17-rc2 with snd-fireface loaded. > > Start JACK with ALSA backend, for example: > > jackd -d alsa -d hw:Fireface -p 64 -n 3 > > Use the system normally — during playback, recording, or even when > idle. The issue may occur at any time without apparent external cause. > > Actual Behavior > > After some idle time, ALSA stops responding and JACK prints: > > ERROR: ALSA: poll time out, polled for ... usecs > ERROR: JackAudioDriver::ProcessAsync: read error, stopping... > > JACK immediately terminates. The Fireface 800 does not recover until > JACK is restarted. > > ________________________________ > > Expected Behavior > > The ALSA FireWire driver should maintain the stream and allow JACK to > continue running without manual restart, even when idle. > > ________________________________ > > Notes > > With FFADO backend (jackd -d firewire), the same hardware works > reliably and does not exhibit this issue. > > This suggests that the problem lies in the ALSA FireWire streaming > engine rather than the hardware itself. > > The problem has been reproducible across all tested kernels (vanila, > rt, liquorix) from 6.10 through 6.17-rc2. > > ________________________________ > > Request > > Could you please confirm if this issue is known? > Is there any ongoing work on the ALSA FireWire streaming engine > (snd-fireface) to address these poll timeout conditions? > > I can provide additional logs (dmesg, journalctl) or test patches if needed. > > Thank you, > > Ilya Kuznetsov. Regards Takashi Sakamoto
