Is someone still working on this issue? It doesn't look like it given the status "Fix Committed". Correct me if I'm wrong but the WiFi chipsets affected by this bug are in widespread use and I think it is a shame that it seems to be impossible to fix something which was demonstrably working in a previous version. Can the dev working on it please comment? Greatly appreciated.
Sticking with kernel 4.4.0-62 indefinitely can't be the solution, or can it? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1666421 Title: kernel 4.4.0-63 with USB WLAN RTL8192CU freezes desktop Status in linux package in Ubuntu: Fix Committed Status in linux source package in Xenial: Fix Committed Status in linux source package in Yakkety: Fix Committed Bug description: booting PC with USB WLAN stick RTL8192CU attached on kernel 4.4.0-63-generic: Grub works, entering full disk encryption passphrase works, but when the desktop comes up mouse and keyboard (via USB) are dead and the desktop also. booting the PC without the stick attached works fine, but as soon as it is attached (see syslog) mouse, keyboard and the desktop itself are dead (checked by opening terminal and "watch date" - freezes, with desktop still visible). problem is resolved by booting former kernel 4.4.0-59-generic. syslog upon attaching stick --------------------------------------------------- Feb 21 07:17:02 orin kernel: [ 188.998338] usb 8-2: new high-speed USB device number 2 using xhci_hcd Feb 21 07:17:02 orin kernel: [ 189.129674] usb 8-2: New USB device found, idVendor=0bda, idProduct=8178 Feb 21 07:17:02 orin kernel: [ 189.129682] usb 8-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Feb 21 07:17:02 orin kernel: [ 189.129687] usb 8-2: Product: USB WLAN Feb 21 07:17:02 orin kernel: [ 189.129691] usb 8-2: Manufacturer: Realtek Feb 21 07:17:02 orin kernel: [ 189.129694] usb 8-2: SerialNumber: 00e04c000001 Feb 21 07:17:02 orin mtp-probe: checking bus 8, device 2: "/sys/devices/pci0000:00/0000:00:10.1/usb8/8-2" Feb 21 07:17:02 orin mtp-probe: bus: 8, device: 2 was not an MTP device Feb 21 07:17:02 orin dbus[1112]: [system] Activating via systemd: service name='org.freedesktop.UDisks2' unit='udisks2.service' Feb 21 07:17:02 orin systemd[1]: Starting Disk Manager... Feb 21 07:17:02 orin udisksd[2447]: udisks daemon version 2.1.7 starting Feb 21 07:17:02 orin dbus[1112]: [system] Successfully activated service 'org.freedesktop.UDisks2' Feb 21 07:17:02 orin systemd[1]: Started Disk Manager. Feb 21 07:17:02 orin udisksd[2447]: Acquired the name org.freedesktop.UDisks2 on the system message bus Feb 21 07:17:02 orin org.gtk.vfs.AfcVolumeMonitor[1918]: Volume monitor alive Feb 21 07:17:03 orin kernel: [ 190.200286] cfg80211: World regulatory domain updated: Feb 21 07:17:03 orin kernel: [ 190.200294] cfg80211: DFS Master region: unset Feb 21 07:17:03 orin kernel: [ 190.200297] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) Feb 21 07:17:03 orin kernel: [ 190.200303] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) Feb 21 07:17:03 orin kernel: [ 190.200308] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) Feb 21 07:17:03 orin kernel: [ 190.200312] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A) Feb 21 07:17:03 orin kernel: [ 190.200317] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A) Feb 21 07:17:03 orin kernel: [ 190.200321] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s) Feb 21 07:17:03 orin kernel: [ 190.200325] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s) Feb 21 07:17:03 orin kernel: [ 190.200329] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A) Feb 21 07:17:03 orin kernel: [ 190.200333] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A) Feb 21 07:17:03 orin kernel: [ 190.223081] rtl8192cu: Chip version 0x11 Feb 21 07:17:03 orin kernel: [ 190.625235] rtl8192cu: MAC address: 14:cc:20:10:43:98 Feb 21 07:17:03 orin kernel: [ 190.625241] rtl8192cu: Board Type 0 Feb 21 07:17:03 orin kernel: [ 190.626355] rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1 Feb 21 07:17:03 orin kernel: [ 190.626408] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin Feb 21 07:17:03 orin NetworkManager[1181]: <info> [1487657823.7698] (wlan0): using nl80211 for WiFi device control Feb 21 07:17:03 orin kernel: [ 190.636625] ieee80211 phy0: Selected rate control algorithm 'rtl_rc' Feb 21 07:17:03 orin kernel: [ 190.637211] usbcore: registered new interface driver rtl8192cu Feb 21 07:17:03 orin systemd[1]: Starting Load/Save RF Kill Switch Status... Feb 21 07:17:03 orin NetworkManager[1181]: <info> [1487657823.7780] device (wlan0): driver supports Access Point (AP) mode Feb 21 07:17:03 orin NetworkManager[1181]: <info> [1487657823.7798] manager: (wlan0): new 802.11 WiFi device (/org/freedesktop/NetworkManager/Devices/4) Feb 21 07:17:03 orin kernel: [ 190.648972] usbcore: registered new interface driver rtl8xxxu Feb 21 07:17:03 orin dbus[1112]: [system] Activating via systemd: service name='fi.w1.wpa_supplicant1' unit='wpa_supplicant.service' Feb 21 07:17:03 orin kernel: [ 190.652729] rtl8192cu 8-2:1.0 wlx14cc20104398: renamed from wlan0 Feb 21 07:17:03 orin systemd[1]: Starting WPA supplicant... Feb 21 07:17:03 orin systemd[1]: Started Load/Save RF Kill Switch Status. Feb 21 07:17:03 orin NetworkManager[1181]: <info> [1487657823.7963] rfkill1: found WiFi radio killswitch (at /sys/devices/pci0000:00/0000:00:10.1/usb8/8-2/8-2:1.0/ieee80211/phy0/rfkill1) (driver rtl8192cu) Feb 21 07:17:03 orin NetworkManager[1181]: <info> [1487657823.8067] device (wlan0): interface index 5 renamed iface from 'wlan0' to 'wlx14cc20104398' Feb 21 07:17:03 orin NetworkManager[1181]: <info> [1487657823.8165] devices added (path: /sys/devices/pci0000:00/0000:00:10.1/usb8/8-2/8-2:1.0/net/wlx14cc20104398, iface: wlx14cc20104398) Feb 21 07:17:03 orin NetworkManager[1181]: <info> [1487657823.8166] device added (path: /sys/devices/pci0000:00/0000:00:10.1/usb8/8-2/8-2:1.0/net/wlx14cc20104398, iface: wlx14cc20104398): no ifupdown configuration found. Feb 21 07:17:03 orin NetworkManager[1181]: <info> [1487657823.8174] device (wlx14cc20104398): state change: unmanaged -> unavailable (reason 'managed') [10 20 2] Feb 21 07:17:03 orin kernel: [ 190.685491] IPv6: ADDRCONF(NETDEV_UP): wlx14cc20104398: link is not ready Feb 21 07:17:03 orin dbus[1112]: [system] Successfully activated service 'fi.w1.wpa_supplicant1' Feb 21 07:17:03 orin wpa_supplicant[2491]: Successfully initialized wpa_supplicant Feb 21 07:17:03 orin systemd[1]: Started WPA supplicant. Feb 21 07:17:03 orin kernel: [ 190.689851] rtl8192cu: MAC auto ON okay! Feb 21 07:17:04 orin kernel: [ 190.890738] rtl8192cu: Tx queue select: 0x05 Feb 21 07:17:06 orin kernel: [ 193.095643] IPv6: ADDRCONF(NETDEV_UP): wlx14cc20104398: link is not ready Feb 21 07:17:06 orin NetworkManager[1181]: <info> [1487657826.2323] supplicant: wpa_supplicant running Feb 21 07:17:06 orin NetworkManager[1181]: <info> [1487657826.2328] device (wlx14cc20104398): supplicant interface state: init -> starting Feb 21 07:17:06 orin ModemManager[1180]: <info> Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:10.1/usb8/8-2': not supported by any plugin Feb 21 07:17:06 orin wpa_supplicant[2491]: dbus: wpa_dbus_get_object_properties: failed to get object properties: (none) none Feb 21 07:17:06 orin wpa_supplicant[2491]: dbus: Failed to construct signal Feb 21 07:17:06 orin NetworkManager[1181]: <info> [1487657826.2973] device (wlx14cc20104398): supplicant interface state: starting -> ready Feb 21 07:17:06 orin NetworkManager[1181]: <info> [1487657826.2975] device (wlx14cc20104398): state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42] Feb 21 07:17:06 orin kernel: [ 193.165895] IPv6: ADDRCONF(NETDEV_UP): wlx14cc20104398: link is not ready Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2574] device (wlx14cc20104398): supplicant interface state: ready -> inactive Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2696] policy: auto-activating connection 'wlankvm' Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2711] device (wlx14cc20104398): Activation: starting connection 'wlankvm' (be9de38c-cfa5-4b6d-9672-655c0cfb7343) Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2716] device (wlx14cc20104398): state change: disconnected -> prepare (reason 'none') [30 40 0] Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2719] manager: NetworkManager state is now CONNECTING Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2729] device (wlx14cc20104398): state change: prepare -> config (reason 'none') [40 50 0] Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2733] device (wlx14cc20104398): Activation: (wifi) access point 'wlankvm' has security, but secrets are required. Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2733] device (wlx14cc20104398): state change: config -> need-auth (reason 'none') [50 60 0] Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2787] device (wlx14cc20104398): state change: need-auth -> prepare (reason 'none') [60 40 0] Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2797] device (wlx14cc20104398): state change: prepare -> config (reason 'none') [40 50 0] Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2800] device (wlx14cc20104398): Activation: (wifi) connection 'wlankvm' has security, and secrets exist. No new secrets needed. Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2801] Config: added 'ssid' value 'wlankvm' Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2801] Config: added 'scan_ssid' value '1' Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2801] Config: added 'key_mgmt' value 'WPA-PSK' Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2801] Config: added 'psk' value '<omitted>' Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.2819] sup-iface[0x2135cc0,wlx14cc20104398]: config: set interface ap_scan to 1 Feb 21 07:17:07 orin wpa_supplicant[2491]: wlx14cc20104398: SME: Trying to authenticate with 00:1a:4f:45:23:23 (SSID='wlankvm' freq=2462 MHz) Feb 21 07:17:07 orin kernel: [ 194.162920] wlx14cc20104398: authenticate with 00:1a:4f:45:23:23 Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.3153] device (wlx14cc20104398): supplicant interface state: inactive -> authenticating Feb 21 07:17:07 orin kernel: [ 194.182549] wlx14cc20104398: send auth to 00:1a:4f:45:23:23 (try 1/3) Feb 21 07:17:07 orin kernel: [ 194.189946] wlx14cc20104398: authenticated Feb 21 07:17:07 orin kernel: [ 194.190420] wlx14cc20104398: associate with 00:1a:4f:45:23:23 (try 1/3) Feb 21 07:17:07 orin wpa_supplicant[2491]: wlx14cc20104398: Trying to associate with 00:1a:4f:45:23:23 (SSID='wlankvm' freq=2462 MHz) Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.3284] device (wlx14cc20104398): supplicant interface state: authenticating -> associating Feb 21 07:17:07 orin kernel: [ 194.221407] wlx14cc20104398: RX AssocResp from 00:1a:4f:45:23:23 (capab=0x411 status=0 aid=3) Feb 21 07:17:07 orin wpa_supplicant[2491]: wlx14cc20104398: Associated with 00:1a:4f:45:23:23 Feb 21 07:17:07 orin kernel: [ 194.239524] wlx14cc20104398: associated Feb 21 07:17:07 orin kernel: [ 194.239592] IPv6: ADDRCONF(NETDEV_CHANGE): wlx14cc20104398: link becomes ready Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.3778] device (wlx14cc20104398): supplicant interface state: associating -> 4-way handshake Feb 21 07:17:07 orin wpa_supplicant[2491]: wlx14cc20104398: WPA: Key negotiation completed with 00:1a:4f:45:23:23 [PTK=CCMP GTK=TKIP] Feb 21 07:17:07 orin wpa_supplicant[2491]: wlx14cc20104398: CTRL-EVENT-CONNECTED - Connection to 00:1a:4f:45:23:23 completed [id=0 id_str=] Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.4083] device (wlx14cc20104398): supplicant interface state: 4-way handshake -> completed Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.4084] device (wlx14cc20104398): Activation: (wifi) Stage 2 of 5 (Device Configure) successful. Connected to wireless network 'wlankvm'. Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.4085] device (wlx14cc20104398): state change: config -> ip-config (reason 'none') [50 70 0] Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.4108] dhcp4 (wlx14cc20104398): activation: beginning transaction (timeout in 45 seconds) Feb 21 07:17:07 orin NetworkManager[1181]: <info> [1487657827.4337] dhcp4 (wlx14cc20104398): dhclient started with pid 2533 ^^^ freeze upon here ------------------------------------------------------------------- WLAN stick (lsusb -v) ------------------------------------------------------------------ Bus 008 Device 002: ID 0bda:8178 Realtek Semiconductor Corp. RTL8192CU 802.11n WLAN Adapter Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x0bda Realtek Semiconductor Corp. idProduct 0x8178 RTL8192CU 802.11n WLAN Adapter bcdDevice 2.00 iManufacturer 1 Realtek iProduct 2 USB WLAN iSerial 3 00e04c000001 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 46 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 500mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 4 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 255 Vendor Specific Subclass bInterfaceProtocol 255 Vendor Specific Protocol iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x03 EP 3 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x84 EP 4 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 bNumConfigurations 1 Device Status: 0x0000 (Bus Powered) -------------------------------------------------------------------------------- ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-59-generic 4.4.0-59.80 ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35 Uname: Linux 4.4.0-59-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: camikusch 2212 F.... pulseaudio /dev/snd/controlC1: camikusch 2212 F.... pulseaudio CurrentDesktop: XFCE Date: Tue Feb 21 07:42:51 2017 HibernationDevice: RESUME=UUID=8259bcba-b0e0-455e-87c3-1554b4a2f9c1 InstallationDate: Installed on 2016-04-19 (307 days ago) InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-59-generic root=/dev/mapper/xubuntu--vg-root ro quiet RelatedPackageVersions: linux-restricted-modules-4.4.0-59-generic N/A linux-backports-modules-4.4.0-59-generic N/A linux-firmware 1.157.8 SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2016-04-22 (305 days ago) dmi.bios.date: 01/14/2016 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P3.40 dmi.board.name: FM2A88X-ITX+ dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP3.40:bd01/14/2016:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnFM2A88X-ITX+:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. 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