On Thu, Aug 29, 2019 at 12:42:44PM +0300, Sergey Maranchuk wrote: > I got some problem after upgrade kernel to 5.2 version (debian testing > linux-image-5.2.0-2-amd64). 5Ghz client stopped to see AP. > Some tests with 1metre distance between client-AP: 2.4Ghz -22dBm, for > 5Ghz - 53dBm !, for longer distance (8m + walls) 2.4 - 61dBm, 5Ghz not > visible. > All works fine with kernel 4.19 and on windows 10, other devices also > see AP without any problems with same distance. After looking on the changlog most possible cause of it seems to be commit 9ad3b55654455258a9463384edb40077439d879f: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9ad3b55654455258a9463384edb40077439d879f Please try to revert it, and see if that improve rx signal level. It that would not help, please try to narrow regression to two consecutive kernel versions - it is: 4.19 -> 5.0 or 5.0 -> 5.1 or 5.1 -> 5.2 ? Stanislaw
