Same problem on Sony VGN-CR41ZR/Ubuntu 18.04 (4.15.0-106-generic) with builtin intel wifi card and additional wifi usb card (maybe this important)
Machine was not suspended, just after some time rest in working (day or couple) with no touching any settings of wifi connection it just hang and flood syslog/kern logs until "no space left on device" and hang. Seems helping (currently in testing) disable intel wifi off and use only external usb wifi card. Can provide some additional info if needed. Environment: Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02) Second usb conroller: 20f4:648b TRENDnet TEW-648UBM 802.11n 150Mbps Micro Wireless N Adapter [Realtek RTL8188CUS] Ubuntu 18.04.4 LTS Linux ubnt 4.15.0-106-generic #107-Ubuntu SMP Thu Jun 4 11:27:52 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux ** Attachment added: "wifi_flood_syslog.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882419/+attachment/5385862/+files/wifi_flood_syslog.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882419 Title: syslog flooded with "wlan0: Failed check-sdata-in-driver check, flags: 0x4" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882419/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
