linux-kernel - Re: [PATCH 1/2] wifi: mt76: mt7921: Disable powersaving by default

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Date:   Wed, 13 Dec 2023 14:35:32 +0100
From:   Felix Fietkau <nbd@....name>
To:     Mario Limonciello <mario.limonciello@....com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Ryder Lee <ryder.lee@...iatek.com>
Cc:     Shayne Chen <shayne.chen@...iatek.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Kalle Valo <kvalo@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Deren Wu <deren.wu@...iatek.com>,
        Ming Yen Hsieh <mingyen.hsieh@...iatek.com>,
        Ben Greear <greearb@...delatech.com>,
        "open list:MEDIATEK MT76 WIRELESS LAN DRIVER" 
        <linux-wireless@...r.kernel.org>,
        "open list:ARM/Mediatek SoC support" <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Sultan Alsawaf <sultan@...neltoast.com>
Subject: Re: [PATCH 1/2] wifi: mt76: mt7921: Disable powersaving by default

On 12.12.23 10:08, Mario Limonciello wrote:
> Several users have reported awful latency when powersaving is enabled
> with certain access point combinations. It's also reported that the
> powersaving feature doesn't provide an ample enough savings to justify
> being enabled by default with these issues.
> 
> Introduce a module parameter that would control the power saving
> behavior.  Set it to default as disabled. This mirrors what some other
> WLAN drivers like iwlwifi do.
> 
> Suggested-by: Sultan Alsawaf <sultan@...neltoast.com>
> Link: https://codeberg.org/Hybrid-Project-Developers/linux-tkg/blame/branch/master/mt76:-mt7921:-Disable-powersave-features-by-default.mypatch
> Link: https://aur.archlinux.org/cgit/aur.git/tree/0027-mt76_-mt7921_-Disable-powersave-features-by-default.patch?h=linux-g14
> Link: https://community.frame.work/t/responded-strange-wlan-problems-with-kernel-branch-6-2/41868/4
> Signed-off-by: Mario Limonciello <mario.limonciello@....com>

This patch is disabling two different things at the same time:
- Wifi powersaving
- Device hardware powersaving

Have you tried simply disabling 802.11 powersave via nl80211 to mitigate 
the issues with affected APs?

- Felix