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** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: bionic
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https://bugs.launchpad.net/bugs/1830350
Title:
System freezes repeatedly for several seconds; wifi driver related
errors
Status in linux package in Ubuntu:
Incomplete
Bug description:
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.
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