Public bug reported:
The WiFi adapter Gigabyte GC-WB867D-I is quite unstable on Ubuntu 18.04.
I do not have data relative to previous versions of Ubuntu since this
PCIe card is part of a new build that has had 18.04 as the first
installed version.
The reason why I can point the finger at the Linux kernel is that the
card seems to work reliably well on Windows 10 (no packet loss when
pinging the local router). On Ubuntu 18.04, the card's behaviour seems
very correlated to the signal strength and exhibits a threshold
phenomenon. With the antenna placed in an obstacle-free area, some ping
packets are occasionally lost. But when some objects are placed near the
antenna (e.g. a phone), the packet loss can get up to 90%. Under the
very same conditions, the packet loss on Windows is exactly 0 (and the
RTT never gets above 500ms).
I have disabled the WiFi power saving (changed from 2 to 3) but that
didn't fix the problem. It seems that restarting the NetworkManager
service helps for a bit, but after a while the problem resurfaces.
The card in question has onboard USB Bluetooth and is pretty much an M.2
to PCIe x1 adapter for an Intel Wifi adapter. The relevant output of
lspci is
03:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev
78)
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-20-generic 4.15.0-20.21
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat May 19 10:32:00 2018
InstallationDate: Installed on 2018-04-29 (19 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: linux-signed
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-signed (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1772154
Title:
Unstable WiFi adapter Gigabyte GC-WB867D-I
Status in linux-signed package in Ubuntu:
New
Bug description:
The WiFi adapter Gigabyte GC-WB867D-I is quite unstable on Ubuntu
18.04. I do not have data relative to previous versions of Ubuntu
since this PCIe card is part of a new build that has had 18.04 as the
first installed version.
The reason why I can point the finger at the Linux kernel is that the
card seems to work reliably well on Windows 10 (no packet loss when
pinging the local router). On Ubuntu 18.04, the card's behaviour seems
very correlated to the signal strength and exhibits a threshold
phenomenon. With the antenna placed in an obstacle-free area, some
ping packets are occasionally lost. But when some objects are placed
near the antenna (e.g. a phone), the packet loss can get up to 90%.
Under the very same conditions, the packet loss on Windows is exactly
0 (and the RTT never gets above 500ms).
I have disabled the WiFi power saving (changed from 2 to 3) but that
didn't fix the problem. It seems that restarting the NetworkManager
service helps for a bit, but after a while the problem resurfaces.
The card in question has onboard USB Bluetooth and is pretty much an
M.2 to PCIe x1 adapter for an Intel Wifi adapter. The relevant output
of lspci is
03:00.0 Network controller: Intel Corporation Wireless 8265 / 8275
(rev 78)
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-20-generic 4.15.0-20.21
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat May 19 10:32:00 2018
InstallationDate: Installed on 2018-04-29 (19 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: linux-signed
UpgradeStatus: No upgrade log present (probably fresh install)
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