My wireless connection to the modem(Zyxel 660HW-T1) associates on bootup but thereafter the connection is dropped, although as indicated in dmesg below the client seems to be attempting to maintain contact.

Here some output...

42.245590] wlan0: authenticate with AP 00:23:f8:97:7b:3f
[ 42.247661] wlan0: authenticated
[ 42.247667] wlan0: associate with AP 00:23:f8:97:7b:3f
[ 42.250028] wlan0: RX AssocResp from 00:23:f8:97:7b:3f (capab=0x411 status=0 aid=3)
[ 42.250034] wlan0: associated
[ 42.250980] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 52.719068] wlan0: no IPv6 routers present
[ 74.040051] hda-intel: azx_get_response timeout, switching to polling mode: last cmd=0x014f0c00
[ 75.041015] hda_intel: azx_get_response timeout, switching to single_cmd mode: last cmd=0x014f0c00
[ 75.041117] hda-intel: spurious response 0x0:0x0, last cmd=0x15f0c00
[ 75.041121] hda-intel: spurious response 0x0:0x0, last cmd=0x15f0c00
[ 75.041124] hda-intel: spurious response 0x0:0x0, last cmd=0x15f0c00
[ 75.041127] hda-intel: spurious response 0x0:0x0, last cmd=0x15f0c00
[ 75.041129] hda-intel: spurious response 0x0:0x0, last cmd=0x15f0c00
.....

eventually....

333.635088] wlan0: no probe response from AP 00:23:f8:97:7b:3f - disassociating
[ 567.432827] ACPI: EC: missing confirmations, switch off interrupt mode.
[ 627.345654] ACPI Exception: AE_TIME, Returned by Handler for [EmbeddedControl] 20090521 evregion-424
[ 627.345665] ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.AMW0.WMCA] (Node ffff8800aca2a720), AE_TIME

Any help would be appreciated.

Regards.

Have you tried turning off ipv6?

Thanks for you time and suggestion. I tried that, but no difference.

Regards.