Public bug reported:
[Impact]
Intel Wifi firmware may crash when it's connected to B/G wireless.
[Fix]
There's a new "feature" that when firmware thinks there are too much
noise in the current frequency, it will automatically disconnect
wifi and expect software/OS to change channel/frequency and reconnect.
Otherwise, firmware crashes.
[Test]
[ 2651.943142] wlp0s20f3: associate with 00:24:a5:b5:f8:93 (try 1/3)
[ 2651.951043] wlp0s20f3: RX AssocResp from 00:24:a5:b5:f8:93 (capab=0x421
status=0 aid=1)
[ 2651.962960] wlp0s20f3: associated
[ 2651.966183] IPv6: ADDRCONF(NETDEV_CHANGE): wlp0s20f3: link becomes ready
[ 2651.972582] wlp0s20f3: Driver requested disconnection from AP
00:24:a5:b5:f8:93
[ 2654.641627] wlp0s20f3: authenticate with 00:24:a5:b5:f8:93
Now it's "Driver requested disconnection" instead of firmware crash.
[Where problems could occur]
The first two patches on 80211 only provide new hook and don't bring any
functional change.
The third patch achieves the "feature" by removing cap
IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G. I am no expert on
80211, but if there's any AP that doesn't support 20MHZ for 2.4G, the
reconnecting may fail.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Focal)
Importance: Undecided
Status: Won't Fix
** Affects: linux-oem-5.10 (Ubuntu Focal)
Importance: Medium
Status: Confirmed
** Affects: linux (Ubuntu Hirsute)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.10 (Ubuntu Hirsute)
Importance: Undecided
Status: Won't Fix
** Tags: oem-priority originate-from-1921340 stella
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Hirsute)
Status: New => Confirmed
** Changed in: linux (Ubuntu Hirsute)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Focal)
Status: New => Won't Fix
** Changed in: linux-oem-5.10 (Ubuntu Hirsute)
Status: New => Won't Fix
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1922171
Title:
Handle Intel Wifi firmware disconnection
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