USB Sound Card - System Freezes
Hi
One of my laptops (installed with arch linux) has a non-repairable faulty audio jack, so I use USB sound card in order use a headphone. However, sometimes suddenly the system freezes and I have to hard reset it. Journalctl is showing following error: Code:
Jul 08 23:32:19 laptop1 pulseaudio[635]: W: [alsa-sink-USB Audio] alsa-util.c: Got POLLNVAL from ALSA Regards |
There are some old posts with the same error, which may (or may not) provide a solution
https://www.linuxquestions.org/quest...r-71-a-643022/ https://forums.gentoo.org/viewtopic-p-6825958.html https://www.linuxquestions.org/quest...r-71-a-756935/ At least they offer some starting points to explore: bad cable, wrong sort of USB port, mysterious command to use, etc. |
These posts are very old and talking about USB 1.1 and USB 2.0. However, my laptop has USB 3.0 and the sound card is also new (bought 4 months ago). Here is the output of lsusb:
Code:
Bus 003 Device 002: ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controller |
During boot, the system gives this error:
Code:
kernel: platform wdat_wdt: failed to claim resource 4: [io 0x0071-0x0072] Code:
kernel: blk_update_request: critical medium error, dev sr1, sector 21488 and this error: Code:
systemd-coredump[747]: Process 677 (csd-keyboard) of user 1000 dumped core. |
No, your hard drive is fine! That would be /dev/sda — /dev/sr1 is an optical drive. Do you have a disk in the drive when you boot up?
That error code on the USB device seems to be indicative of a very low-level problem: the computer finds the device unusable. Did you try using different ports, both USB2 and USB3? Have you tried the device on a different computer? I'd expect a fault in the device to show up more often, though, and it's strange that it should cause a lock-up. If the audio jack stopped working, it might be that the USB controller is about to go too. These sort of occasional failings can be very difficult to track down. This computer crashes about once a month. After making sure the memory wasn't faulty, I decided to live with it. |
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