Public bug reported:
I updated my system about a month ago (Fri 26 April 2019). This was the
first update in several weeks and installed fresh versions of a whole
truck load of applications including a kernel update. Since this latest
bunch of updates the system freezes for a few seconds at regular
intervals. Not fatal, but very annoying.
Output from "journalctl -f" shows the following errors occurring at the
same time as these freezes:
May 24 10:31:18 dellfvw wpa_supplicant[1078]: wlp3s0: CTRL-EVENT-SCAN-FAILED
ret=-110
May 24 10:31:18 dellfvw kernel: ath10k_pci 0000:03:00.0: failed to receive scan
abortion completion: timed out
May 24 10:31:18 dellfvw kernel: ath10k_pci 0000:03:00.0: failed to stop scan:
-110
May 24 10:31:18 dellfvw kernel: ath10k_pci 0000:03:00.0: failed to start hw
scan: -110
Corresponding lines in /var/log/syslog:
May 24 10:29:16 dellfvw avahi-daemon[1053]: Registering new address record for
fe80::424:c75b:2a2d:52e2 on wlp3s0.*.
May 24 10:29:55 dellfvw avahi-daemon[1053]: Withdrawing address record for
fe80::424:c75b:2a2d:52e2 on wlp3s0.
May 24 10:31:18 dellfvw wpa_supplicant[1078]: wlp3s0: CTRL-EVENT-SCAN-FAILED
ret=-110
May 24 10:31:18 dellfvw kernel: [45569.661175] ath10k_pci 0000:03:00.0: failed
to receive scan abortion completion: timed out
May 24 10:31:18 dellfvw kernel: [45569.661183] ath10k_pci 0000:03:00.0: failed
to stop scan: -110
May 24 10:31:18 dellfvw kernel: [45569.661187] ath10k_pci 0000:03:00.0: failed
to start hw scan: -110
I do note the interval between the avahi-daemon entry and the subsequent
errors related to the wireless network interface, but the former precede
the latter consistently in syslog, suggesting they may be related, which
is why I'm including it in this report.
The freezes last a few seconds. Keyboard input is preserved at this time
and typed input appears after the freeze is resolved. Mouse cursor
continues to move during freezes but mouse clicks are only processed
after the freeze is resolved, i.e. the result of the mouse click is
suspended (e.g. buffered) until the system becomes responsive again. For
example, clicking on a window during the freeze will focus that window
after the freeze has been resolved.
The system is a Dell Inspiron 15 3576. Relevant output of lspci -nnk:
03:00.0 Network controller [0280]: Qualcomm Atheros QCA9377 802.11ac
Wireless Network Adapter [168c:0042] (rev 31)
Output of lsb_release -rd:
Description: Ubuntu 18.04.2 LTS
Release: 18.04
Output of uname -a:
Linux dellfvw 4.15.0-50-generic #54-Ubuntu SMP Mon May 6 18:46:08 UTC 2019
x86_64 x86_64 x86_64 GNU/Linux
As already said, this is a new issue that has began occurring only after
the recent batch of updates that included a kernel update. I reported
the bug (maybe in the wrong place) but so far I have received no
response. I've lived with this for a month or so hoping that further
updates would fix the problem but it still persists. Installing the
latest firmware update (14 Mar 2019) has no effect. No other changes
were made to either hardware or OS configuration.
Logfile snippets attached.
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: kernel-bug
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1830350
Title:
System freezes repeatedly for several seconds; wifi driver related
errors
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+bug/1830350/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
