Did anybody check the current kernel from zesty? I'm thinking about
upgrading, but don't want to render the thing unbootable because there's
no working kernel left.

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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

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