Upgrading to 5.6.0 leaves my work laptop without wifi, there seems to be three tries and a timeout - it never manages to connect. It's a: HP EliteBook 840 G5 With: 01:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78) Other laptop with a different driver works fine though...
Sorry, this works ok with 5.5.13 - but not with with 5.6
Ok so this is known: https://www.phoronix.com/scan.php?page=news_item&px=Linux-5.6-Broken-Intel-IWLWIFI
I can confirm the issue. The particular commit in the changeset that causes the problem is ce2e1ca703071723ca2dd94d492a5ab6d15050da "[PATCH] mac80211: Check port authorization in the ieee80211_tx_dequeue() case", and reverting it fixes the issue for me. Applying the fix linked from that Phoronix article should be a better solution though.