It's important to notice that this bugs affects any post-4.12 kernel, so it's present in both 16.04.3 HWE and 17.10 versions.
** Description changed: 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 https://askubuntu.com/questions/967355/wifi-unstable-after-17-10-update - While led me to this bug report on Debian's bug tracker: + Which led me to this bug report on Debian's bug tracker: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=879184 Which led me to this bug in upstream: http://lists.infradead.org/pipermail/ath10k/2017-September/010088.html 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 - rekeying routines. Updating the board-2.bin and firmware-6.bin from - kvalo's git repository for version RM4.4.1 has worked for me and for - other users as well. + rekeying routines. - It seems it only happend in >4.12 kernels, hence why I've only had + 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 16.04.3. - The files were fetched from https://github.com/kvalo/ath10k-firmware as - of this date, as of commit 35d8642f452827b955470de4ac997ffe906a6f17, - with the following sha256 sums: + 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 + upstream. - 8fcc6b96c1895bc227c3caf0bd04b23d0292f8f919e819e4e025e29ef4b44d8e board-2.bin - 30fc3db3af9ba9f3b88e523fe39b715826a31738d48ca01a3fad0d14f7e46e20 firmware-6.bin_WLAN.RM.4.4.1-00065-QCARMSWP-1 + Updating the firmware-6.bin and board-2.bin to any version equal or + later than that fixes the issue completely. - It seems firmware-6.bin_WLAN.RM.4.4.1-00079-QCARMSWPZ-1 (sha256sum - 5554d6aa0de07394938a0094bae725ed24d4ceee3b38c849b4099a496ec50b48) works - as well. + ------------------------------------------------------------- + + SRU Justification: + [Impact] + 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 time. + + [Test Case] + 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 + + [Regression Potential] + 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 Release: 16.04 linux-firmware: - Instalado: 1.157.14 - Candidato: 1.157.14 - Tabela de versão: - *** 1.157.14 500 - 500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages - 500 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages - 500 http://archive.ubuntu.com/ubuntu xenial-security/main amd64 Packages - 500 http://archive.ubuntu.com/ubuntu xenial-security/main i386 Packages - 100 /var/lib/dpkg/status - 1.157 500 - 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages - 500 http://archive.ubuntu.com/ubuntu xenial/main i386 Packages + Instalado: 1.157.14 + Candidato: 1.157.14 + Tabela de versão: + *** 1.157.14 500 + 500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages + 500 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages + 500 http://archive.ubuntu.com/ubuntu xenial-security/main amd64 Packages + 500 http://archive.ubuntu.com/ubuntu xenial-security/main i386 Packages + 100 /var/lib/dpkg/status + 1.157 500 + 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages + 500 http://archive.ubuntu.com/ubuntu xenial/main i386 Packages -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-firmware in Ubuntu. https://bugs.launchpad.net/bugs/1743279 Title: QCA6174 stops working on newer kernels after second group rekeying Status in linux-firmware package in Ubuntu: New Bug description: 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 https://askubuntu.com/questions/967355/wifi-unstable- after-17-10-update Which led me to this bug report on Debian's bug tracker: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=879184 Which led me to this bug in upstream: http://lists.infradead.org/pipermail/ath10k/2017-September/010088.html 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 rekeying routines. 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 16.04.3. 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 upstream. Updating the firmware-6.bin and board-2.bin to any version equal or later than that fixes the issue completely. ------------------------------------------------------------- SRU Justification: [Impact] 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 time. [Test Case] 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 [Regression Potential] 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 Release: 16.04 linux-firmware: Instalado: 1.157.14 Candidato: 1.157.14 Tabela de versão: *** 1.157.14 500 500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 500 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages 500 http://archive.ubuntu.com/ubuntu xenial-security/main amd64 Packages 500 http://archive.ubuntu.com/ubuntu xenial-security/main i386 Packages 100 /var/lib/dpkg/status 1.157 500 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages 500 http://archive.ubuntu.com/ubuntu xenial/main i386 Packages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1743279/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
