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Hi,
Le 2022-04-05 14:39, Xavier Chantry a écrit :
Package: linux-image-amd64
Version: 5.10.84-1
Severity: important
X-Debbugs-Cc: chantry.xavier@gmail.com
Dear Maintainer,
We have a problem with MEDIATEK 7961 wireless on Levono P14s with AMD
Ryzen.
With 5.10 kernel on debian stable the wireless just does not work, so we
installed kernel 5.16 from testing.
With kernel 5.16 the wireless is so slow that it's unusable, each
internet query takes several seconds. A simple ping to google.com varies
from 100ms to 3000ms.
With kernel 5.17 it's slighly better but the ping still goes up to
600ms.
With kernel 5.15 however, it works quite good, Internet is very usable,
ping varies from 3ms to 30ms.
(on the same network, the P14s with Intel wireless does better and is
always under 10ms).
It looks like big changes were made to the mt7921e driver in 5.16
according to Phoronix :
The Mediatek MT7921 WiFi driver has added support for 6GHz WiFi, active
state power management (ASPM), and other improvements.
And it looks like this caused a big regression with MEDIATEK 7961.
Besides the network performance problem on 5.16, suspend/resume is also
broken, while it works perfectly on 5.15.
Le 2022-04-06 10:19, Christoph Martin a écrit :
I have the same Problem with an P14s and Mediathek 7921e.
There is even about 30% package loss.
Christoph
Am 05.04.22 um 14:39 schrieb Xavier Chantry:
With kernel 5.16 the wireless is so slow that it's unusable, each
internet query takes several seconds. A simple ping to google.com varies
from 100ms to 3000ms.
With kernel 5.17 it's slighly better but the ping still goes up to
600ms.
Le 2022-04-15 14:19, Julien Negros a écrit :
Hi,
Same issue here, switching to linux-image-5.15.0-0.bpo.3-amd64 did the
trick. Hope the next kernel version fixes this problem !
Cheers
--
Julien Négros
Linux 5.17.3 (uploaded to unstable earlier today) includes a lot of fixes for
Mediatek WLAN devices. Could you please check if that kernel fixes the slowness
you are seeing?
Cheers,
Vincent