f55c7e9ab5
Detect Intel BE200/BE211 WiFi cards and disable WiFi 7 (EHT) via modprobe config. The iwlwifi driver has broken EHT RX adaptation causing APs to drop to MCS 0, making WiFi unusable. Falling back to WiFi 6 (HE) restores full performance. Temporary fix: remove when Intel fixes the firmware/driver. Signed-off-by: Spencer Bull <Spencer.Bull@Dell.com> Co-authored-by: David Heinemeier Hansson <david@hey.com>
16 lines
716 B
Bash
16 lines
716 B
Bash
# Temporary fix for Dell XPS 14/16 on Panther Lake
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# Disable WiFi 7 (EHT/802.11be) on Intel BE200/BE211 cards
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# The iwlwifi driver has a broken EHT RX data path — APs drop to MCS 0 NSS 1
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# when EHT is negotiated, making WiFi unusable. Disabling EHT falls
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# back to WiFi 6 (HE/802.11ax) which works at full speed.
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# This should be removed when Intel fixes the firmware/driver.
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if lspci -nn | grep -qE '\[8086:(e440|272b)\]'; then
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sudo tee /etc/modprobe.d/iwlwifi-disable-eht.conf << 'EOF'
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# Temporary fix Dell XPS 14/16 on Panther lake
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# Disable WiFi 7 (EHT) on Intel BE200/BE211 — broken RX rate adaptation
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# Remove this file when fixes land in the iwlwifi EHT data path
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options iwlwifi disable_11be=Y
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EOF
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fi
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