Hello,

After a few hours my ubuntu workstation becomes unresponsive (requiring a Sysreq reisub to reboot):

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$ cat /var/log/syslog | grep 20:25 Oct 31 20:25:01 soulwax CRON[1587]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1) Oct 31 20:25:28 soulwax pulseaudio[1824]: [alsa-sink-ALC283 Analog] alsa-util.c: snd_pcm_delay() returned a value that is exceptionally large: -417964 bytes (-2369 ms). Oct 31 20:25:28 soulwax pulseaudio[1824]: [alsa-sink-ALC283 Analog] alsa-util.c: Most likely this is a bug in the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA developers. Oct 31 20:25:29 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (II) event3  - Logitech USB Optical Mouse: SYN_DROPPED event - some input events have been lost. Oct 31 20:25:31 soulwax pulseaudio[1824]: [alsa-sink-ALC283 Analog] alsa-util.c: snd_pcm_dump(): Oct 31 20:25:32 soulwax pulseaudio[1824]: [alsa-sink-ALC283 Analog] alsa-util.c: Soft volume PCM Oct 31 20:25:34 soulwax pulseaudio[1824]: [alsa-sink-ALC283 Analog] alsa-util.c: Control: PCM Playback Volume Oct 31 20:25:34 soulwax pulseaudio[1824]: [alsa-sink-ALC283 Analog] alsa-util.c: min_dB: -51 Oct 31 20:25:35 soulwax pulseaudio[1824]: [alsa-sink-ALC283 Analog] alsa-util.c: max_dB: 0 Oct 31 20:25:36 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (II) event4  - Logitech USB Keyboard: SYN_DROPPED event - some input events have been lost. Oct 31 20:25:36 soulwax pulseaudio[1824]: [alsa-sink-ALC283 Analog] alsa-util.c: resolution: 256 Oct 31 20:25:37 soulwax pulseaudio[1824]: [alsa-sink-ALC283 Analog] alsa-util.c: Its setup is: Oct 31 20:25:37 soulwax pulseaudio[1824]: [alsa-sink-ALC283 Analog] alsa-util.c:   stream       : PLAYBACK Oct 31 20:25:37 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (**) Option "fd" "21" Oct 31 20:25:37 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (II) event2  - Power Button: device removed Oct 31 20:25:38 soulwax pulseaudio[1824]: [alsa-sink-ALC283 Analog] alsa-util.c:   access       : MMAP_INTERLEAVED Oct 31 20:25:38 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (**) Option "fd" "24" Oct 31 20:25:39 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (II) event5  - Video Bus: device removed Oct 31 20:25:39 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (**) Option "fd" "25" Oct 31 20:25:39 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (II) event1  - Power Button: device removed Oct 31 20:25:40 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (**) Option "fd" "26" Oct 31 20:25:40 soulwax kernel: [35165.869886] rfkill: input handler enabled Oct 31 20:25:40 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (II) event0  - Sleep Button: device removed Oct 31 20:25:40 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (**) Option "fd" "27" Oct 31 20:25:40 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (II) event3  - Logitech USB Optical Mouse: device removed Oct 31 20:25:41 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (**) Option "fd" "28" Oct 31 20:25:41 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (II) event4  - Logitech USB Keyboard: device removed Oct 31 20:25:41 soulwax pulseaudio[1824]: [alsa-sink-ALC283 Analog] alsa-util.c:   format       : S16_LE Oct 31 20:25:42 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (**) Option "fd" "29" Oct 31 20:25:42 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (II) event6  - Logitech USB Keyboard: device removed Oct 31 20:25:43 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (**) Option "fd" "30" Oct 31 20:25:54 soulwax /usr/lib/gdm3/gdm-x-session[1673]: (II) event7  - ITE8713 CIR transceiver: device removed

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http://www.alsa-project.org/db/?f=d5e5889f64b41a208f4dad2c1ac4b49a9b9ec558

Hope that can help.

Sergei