Hello, the package linux-firmware - 1.169.3 doesn't fix the bug on 17.10 for
me... quite the reverse
The wifi connexion was still very unstable, downgraded until i switched
yesterday to the "kvalo Firmware patches" : no more errors like "ath: phy0: DMA
failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x02000020
DMADBG_7=0x0000a400" in dmesg and high speed connection.
I had no pb before on 17.04
ubuntu 17.10 (from 17.04) on Dell XPS8700 with Qualcomm Atheros AR9485
Wireless Network Adapter
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QCA6174 stops working on newer kernels after second group rekeying
Status in linux-firmware package in Ubuntu:
Status in linux-firmware source package in Xenial:
Status in linux-firmware source package in Artful:
After upgrading to the 4.13 kernel on Ubuntu 16.04.3, I've noticed my
WiFi would stop working after every 20 minutes or so. The problem
initially seems related to some DNS services crashing because of what
happend in browsers and other software that usually rely on DNS but
I've noticed I couldn't ping my router and other local devices for
which I knew the IP addresses. The connection is still presented as
being connected, but it just doesn't work.
After googling a lot, I came across this question on askubuntu.com
Which led me to this bug report on Debian's bug tracker:
Which led me to this bug in upstream:
I've tested the proposed fixes myself and I can confirm they work.
What causes the WiFi to stop working is a bug related to the group
It seems it only happens in >4.12 kernels, hence why I've only had
problems after 4.13 was pushed as the current rolling HWE kernel for
kvalo made the fix available in version WLAN.RM.4.4.1-00051-QCARMSWP-1
of the firmware-6.bin file, which is the current one present in
Updating the firmware-6.bin (and board-2.bin, optionally) to any
version equal or later than that fixes the issue completely.
Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter, available in
numerous laptops, including ones that ship with Ubuntu 16.04 pre-installed,
silently stops working after the second group rekeying, which is usually few
minutes after the user has connected to a WiFi network. The connection status
remains unchanged but there's no connectivity at all. This effectively
disconnects the user without notifying it of what's occurred.
Additionally, this happens for the only HWE kernel that's been patched
against the recent Meltdown vulnerability, leaving the user without
the option of using a recent kernel and a secure kernel at the same
After applying the required firmwares, check if the connectivity is
unaffected after the second group rekeying, which can be checked with
$ cat /var/log/syslog | grep wpa_.*rekeying
[How to fix it]
Update the firmware-6.bin file to version
WLAN.RM.4.4.1-00051-QCARMSWP-1 or later.
The new firmware overwrites the old one, but since it's been in upstream
since October 2017, it should be good.
Description: Ubuntu 16.04.3 LTS
Tabela de versão:
*** 1.157.14 500
500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64
500 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages
500 http://archive.ubuntu.com/ubuntu xenial-security/main amd64
500 http://archive.ubuntu.com/ubuntu xenial-security/main i386
500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
500 http://archive.ubuntu.com/ubuntu xenial/main i386 Packages
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