Yep, that does the trick. Thank you!

Tested-by: Martin Weinelt <[email protected]>

On 12/14/19 11:38 PM, David Bauer wrote:
With this patch, txpower for the PHY is applied when configuring the PHY
instead of the VIF. Otherwise, the configured txpower is not applied for
the first initialized VIF when using DFS channels, as it is currently
applied to early when the CAC hasn't finished.

Reported-by: Martin Weinelt <[email protected]
Signed-off-by: David Bauer <[email protected]>
---
  .../mac80211/files/lib/netifd/wireless/mac80211.sh       | 9 +++++++--
  1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh 
b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
index 18033e9d56..f1882ec509 100644
--- a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
+++ b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
@@ -743,7 +743,7 @@ mac80211_setup_vif() {
json_select config
        json_get_vars mode
-       json_get_var vif_txpower txpower
+       json_get_var vif_txpower
        json_get_var vif_enable enable 1
[ "$vif_enable" = 1 ] || action=down
@@ -753,7 +753,6 @@ mac80211_setup_vif() {
                json_select ..
                return
        }
-       set_default vif_txpower "$txpower"
        [ -z "$vif_txpower" ] || iw dev "$ifname" set txpower fixed 
"${vif_txpower%%.*}00"
case "$mode" in
@@ -908,6 +907,12 @@ drv_mac80211_setup() {
        iw phy "$phy" set antenna_gain $antenna_gain
        iw phy "$phy" set distance "$distance"
+ if [ -n "$txpower" ]; then
+               iw phy "$phy" set txpower fixed "${txpower%%.*}00"
+       else
+               iw phy "$phy" set txpower auto
+       fi
+
        [ -n "$frag" ] && iw phy "$phy" set frag "${frag%%.*}"
        [ -n "$rts" ] && iw phy "$phy" set rts "${rts%%.*}"

--
Und im übrigen bin ich der Meinung, dass Geräte mit weniger als 8MB Flash und 64MB RAM zerstört werden müssen.
-- frei nach Marcus Porcious Cato der Ältere

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