Public bug reported:
We were not able to completely pin-point the issue yet, so this is more
of a blanket bug for the current issues we are seeing. We don't know
where exactly the issue can be located.
While preparing and testing 18.04.4, certification reported issues with
our uc18 images on the pi4 with wifi ac tests. One of our engineers
(Brian) confirmed it locally with a wifi access point restricted only to
802.11ac. After some additional testing, he noticed that he had the same
unreliable symptoms for both the classic and core images, as well as the
19.10.1 classic images. The symptoms seem to vary, from inability to
detect 802.11ac APs, unability to connect and/or receive an IP address
and no traffic getting through.
We will provide all the information that we have. Raspbian, after some
initial testing, seems to work better in this regard (though we saw
various reports of it still being a bit flaky). We have tried pulling in
the wifi firmware bits from Raspbian and using those, but the issues
were still the same.
** Affects: linux-firmware (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-firmware-raspi2 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-raspi2-5.3 (Ubuntu)
Importance: High
Status: New
** Affects: linux-firmware (Ubuntu Bionic)
Importance: Undecided
Status: New
** Affects: linux-firmware-raspi2 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Affects: linux-raspi2-5.3 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Affects: linux-firmware (Ubuntu Eoan)
Importance: Undecided
Status: New
** Affects: linux-firmware-raspi2 (Ubuntu Eoan)
Importance: Undecided
Status: New
** Affects: linux-raspi2-5.3 (Ubuntu Eoan)
Importance: Undecided
Status: New
** Changed in: linux-raspi2-5.3 (Ubuntu)
Status: Confirmed => New
** Also affects: linux-firmware (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux-firmware-raspi2 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux-firmware (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-firmware-raspi2 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-raspi2-5.3 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-firmware (Ubuntu Eoan)
Importance: Undecided
Status: New
** Also affects: linux-firmware-raspi2 (Ubuntu Eoan)
Importance: Undecided
Status: New
** Also affects: linux-raspi2-5.3 (Ubuntu Eoan)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1862760
Title:
Unreliable 802.11ac connection on our raspi images
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