Having similar issues (kernel panic, not being able to connect to wireless networks both from network manager and nmtui) with RTL8188CUS wifi adapter on Ubuntu Mate 16.04 and now on 17.04.
Following the instructions here solved the problem: https://sites.google.com/site/easylinuxtipsproject/reserve-7#TOC-Realtek-RTL8188CUS-and-RTL8192CU-chipsets-0bda:8176-and-0bda:8178- -- 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/1667160 Title: Kernel panic when using rtlwifi since 4.8.0-1025 on RasPi 2 Status in linux package in Ubuntu: Confirmed Status in linux-meta-raspi2 package in Ubuntu: Confirmed Bug description: I have a Raspberry Pi 2 running Ubuntu 16.10 without problems. I use wicd to let it connect to my WiFi with a RTL8188CUS USB dongle. And there's a RTL2838 DVB-T USB stick attached to monitor airplane positions for Flightradar24. After updateing the kernel from 4.8.0-1024, which runs flawlessly, to -1025, there's a kernel panic happening 10-20 seconds after booting up to the login prompt. I thought the -1026 fixed that, but it's still no worky. The trace is scrolling so fast I can't read anything but the last page: [<808c76c8>] (sock_sendmsg) from... [<808c7778>] (sock_write_iter) from... [<802c39c8>] (new_sync_write) from... [<802c3a4c>] (__vfs_write) from... [<802c48d8>] (vfs_write) from... [<802c5ab4>] (SyS_write) from... Code: e5922004 e0033002 e3530000 0a00000a (e5902034) ---[ end trace 0f53d17efe0c6ba ]--- Kernel panic - not syncing: Fatal exception in interrupt CPU2: stopping CPU: 2 PID: 21 Comm: migration/2 Tainted: G D 4.8.0-1026-raspi2 #29-Ubuntu Hardware name: BCM2709 [<801120ac>] (unwind_backtrace) from ... [<8010d2dc>] (show_stack) from ... [<8059c38c>] (handle_IPI) from ... [<80101564>] (bcm2836_arm_irqchip_handle_irq) from [<80a49f3c>] (__irq_svc+0x5c/0x7c) Exception stack(0xbb99de68 to 0xbb99deb0) de60: 00000000 00000004 00000000 00000001 bac05de0 00000001 de80: bac05dcc 00000000 a00e0013 00000000 bac05d6c bb99dedc bb99dee0 bb99deb8 dea0: 801d367c 801d35f4 600e0013 ffffffff [<80a49f3c>] (__irq_svc) from ... [<801d35f4>] (multi_cpu_stop) from ... [<801d38ec>] (cpu_stopper_thread) from ... [<8014b71c>] (smpboot_thread_fn) from ... [<80147770>] (kthread) from [<80108e28>] (ret_from_fork+0x14/0x2c) And then this block repeats with CPU3 and CPU0. Going back to 4.8.0-1024 makes everything work again. Affected packages: linux-image-4.8.0-1025-raspi2:armhf (4.8.0-1025.28) linux-image-4.8.0-1026-raspi2:armhf (4.8.0-1026.29) --- AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Jul 25 2016 seq crw-rw---- 1 root audio 116, 33 Jul 25 2016 timer AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.8.0-1024-raspi2. AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.20.3-0ubuntu8.2 Architecture: armhf ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: N/A DistroRelease: Ubuntu 16.10 Lsusb: Bus 001 Device 005: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T Bus 001 Device 004: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS] Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Package: linux (not installed) PciMultimedia: ProcFB: 0 BCM2708 FB ProcKernelCmdLine: dma.dmachans=0x7f35 bcm2708_fb.fbwidth=656 bcm2708_fb.fbheight=416 bcm2709.boardrev=0xa01041 bcm2709.serial=0xecd3f749 smsc95xx.macaddr=B8:27:EB:D3:F7:49 bcm2708_fb.fbdepth=16 bcm2708_fb.fbswap=1 bcm2709.uart_clock=48000000 bcm2709.disk_led_gpio=47 bcm2709.disk_led_active_low=0 vc_mem.mem_base=0x3ea00000 vc_mem.mem_size=0x3f000000 net.ifnames=0 dwc_otg.lpm_enable=0 console=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait ProcVersionSignature: Ubuntu 4.8.0-1024.27-raspi2 4.8.16 RelatedPackageVersions: linux-restricted-modules-4.8.0-1024-raspi2 N/A linux-backports-modules-4.8.0-1024-raspi2 N/A linux-firmware 1.161.1 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no Tags: yakkety Uname: Linux 4.8.0-1024-raspi2 armv7l UnreportableReason: The report belongs to a package that is not installed. UpgradeStatus: Upgraded to yakkety on 2016-10-24 (122 days ago) UserGroups: adm audio cdrom dialout floppy fuse netdev plugdev sudo users video www-data _MarkForUpload: False To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1667160/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
