Help uninstalling Backports v4.4-rc2 from Kali v2.0

[brunoaduarte]

I was trying to hack my ath9k firmware in Kali v2.0 (to increase tx power in Atheros AR9271), so i downloaded Backports v4.4-rc2, and changed the ath9k source code.

Then i compiled backports and installed it

make defconfig-ath9k-debug
make
make install

But it failed to load, and it removed other drivers from Kali (my another wlan B43 device stopped working).

Jan 19 02:54:37 android kernel: [  155.728045] usb 3-5: new high-speed USB device number 2 using ehci-pci
Jan 19 02:54:37 android kernel: [  155.876946] usb 3-5: New USB device found, idVendor=0cf3, idProduct=9271
Jan 19 02:54:37 android kernel: [  155.876951] usb 3-5: New USB device strings: Mfr=16, Product=32, SerialNumber=48
Jan 19 02:54:37 android kernel: [  155.876954] usb 3-5: Product: UB91C
Jan 19 02:54:37 android kernel: [  155.876957] usb 3-5: Manufacturer: ATHEROS
Jan 19 02:54:37 android kernel: [  155.876959] usb 3-5: SerialNumber: 12345
Jan 19 02:54:39 android kernel: [  157.362385] usb 3-5: ath9k_htc: Firmware ath9k_htc/htc_9271-1.4.0.fw requested
Jan 19 02:54:39 android kernel: [  157.362804] usbcore: registered new interface driver ath9k_htc
Jan 19 02:54:39 android kernel: [  157.385410] usb 3-5: Direct firmware load for ath9k_htc/htc_9271-1.4.0.fw failed with error -2
Jan 19 02:54:39 android kernel: [  157.385418] usb 3-5: ath9k_htc: Firmware htc_9271.fw requested
Jan 19 02:54:39 android kernel: [  157.392737] usb 3-5: firmware: direct-loading firmware htc_9271.fw
Jan 19 02:54:39 android kernel: [  157.674453] usb 3-5: ath9k_htc: Transferred FW: htc_9271.fw, size: 50980
Jan 19 02:54:39 android kernel: [  157.914947] ath9k_htc 3-5:1.0: ath9k_htc: HTC initialized with 33 credits
Jan 19 02:54:40 android kernel: [  158.977950] ath9k_htc 3-5:1.0: ath9k_htc: FW Version: 1.3
Jan 19 02:54:40 android kernel: [  158.977956] ath9k_htc 3-5:1.0: FW RMW support: Off
Jan 19 02:54:41 android kernel: [  159.042723] ieee80211 phy0: Atheros AR9271 Rev:1

So now i want to uninstall this backports, but it's not working.

root@android:~# lsmod | grep ath && lsmod | grep b43
ath9k_htc              65536  0
ath9k_common           32768  1 ath9k_htc
ath9k_hw              458752  2 ath9k_common,ath9k_htc
ath                    24576  3 ath9k_common,ath9k_htc,ath9k_hw
mac80211              573440  1 ath9k_htc
cfg80211              401408  4 ath,ath9k_common,mac80211,ath9k_htc
compat                 20480  6 ssb,bcma,cfg80211,ath9k_common,mac80211,ath9k_htc
usbcore               176128  4 uhci_hcd,ehci_hcd,ehci_pci,ath9k_htc

Then i tried

modprobe -r `lsmod|grep ^ath`
make uninstall
update-initramfs -u
(reboot)

but modinfo still shows the backports version

filename:       /lib/modules/4.0.0-kali1-686-pae/updates/drivers/net/wireless/ath/ath9k/ath9k_htc.ko
firmware:       ath9k_htc/htc_9271-1.4.0.fw
firmware:       ath9k_htc/htc_7010-1.4.0.fw
version:        backported from Linux (v4.4-rc2-0-g1ec2183) using backports v4.4-rc2-1-0-g005b70f
description:    Atheros driver 802.11n HTC based wireless devices
license:        Dual BSD/GPL
author:         Atheros Communications
srcversion:     314A814F01208356D40DB05
alias:          usb:v0CF3p20FFd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v04DAp3904d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0411p0197d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0411p017Fd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v083ApA704d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0846p9018d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0CF3p7010d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v1668p1200d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0CF3p7015d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0471p209Ed*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v057Cp8403d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0CF3pB002d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0CF3pB003d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v040Dp3801d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v04CAp4605d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v13D3p3350d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v13D3p3349d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v13D3p3348d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v13D3p3346d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v13D3p3328d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v13D3p3327d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v07D1p3A10d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0846p9030d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0CF3p1006d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0CF3p9271d*dc*dsc*dp*ic*isc*ip*in*
depends:        mac80211,ath9k_hw,ath9k_common,compat,ath,cfg80211,usbcore
vermagic:       4.0.0-kali1-686-pae SMP mod_unload modversions 686
parm:           debug:Debugging mask (uint)
parm:           nohwcrypt:Disable hardware encryption (int)
parm:           btcoex_enable:Enable wifi-BT coexistence (int)
parm:           ps_enable:Enable WLAN PowerSave (int)
parm:           use_dev_fw:Use development FW version (int)
parm:           blink:Enable LED blink on activity (int)

Please, how can i completely remove this backports and restore to kali original kernel drivers ?

Thanks !

UPDATE
------------------------
Problem solved...

The following sequence did the job.

modprobe -r `lsmod|grep ^ath`
make uninstall
update-initramfs -u
(reboot)

I don't know why it didn't worked first time though.