Posts: 1
Joined: Tue Jul 09, 2019 1:52 am

Kernel Panic when connecting to wlan1

Tue Jul 09, 2019 3:17 am

I'm working on a Raspberry Pi project that runs headless as a print server. Some features need wi-fi connection, so I added a wi-fi dongle that runs a separate network with fixed IP (wlan1), so users can connect to that network using their phones and configure the local network (wlan0) in a web interface.

Everything was working fine with Raspbian 4.14.79-v7, but when I try to upgrade to a new version, most of the times I get a kernel panic when connecting to wlan1.

Wi-Fi device: Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter

Steps to reproduce:
- Install Raspbian Lite version 4.19.42-v7 or later;
- Follow these steps: https://www.raspberrypi.org/documentati ... et-sharing;
- Set a network in /etc/wpa_supplicant/wpa_supplicant.conf;
- Reboot;
- Try connecting to wlan1: kernel panic most of the time.

I've tested this on a lot of devices (~10), all RPi 3 B or RPi 3 B+, and they all behave like this. Reproducing the same steps listed above, but with Raspbian 4.14.79, they all work as expected.

I've checked https://github.com/raspberrypi/linux for any issues related, but found none.

I'm I missing something? On a clean installation of version 4.14.79, following the steps described at raspberrypi.org, everything works as expected. In 4.19.42 I just get kernel panics.


Posts: 3660
Joined: Thu May 05, 2016 9:33 am
Location: Paris, France

Re: Kernel Panic when connecting to wlan1

Tue Jul 09, 2019 8:55 am

Not sure which driver that device uses, but one of the Realtek drivers was modified 2 months ago it seems
https://github.com/raspberrypi/linux/tr ... /rtl8192cu
If you follow the link to the upstream repo perhaps you can find relevant info.
"S'il n'y a pas de solution, c'est qu'il n'y a pas de problème." Les Shadoks, J. Rouxel

Posts: 57
Joined: Wed Nov 30, 2016 4:16 pm

Re: Kernel Panic when connecting to wlan1

Fri Aug 09, 2019 12:50 am

I'm seeing this as well. Same chip set, though I believe I may have seen it with others as well. First encountered with Buster, now an updated Stretch fails as well.

Posts: 8
Joined: Wed May 29, 2013 11:06 am

Re: Kernel Panic when connecting to wlan1

Wed Oct 09, 2019 8:18 am

I am facing the same problem.
Using raspbian buster released 26 sept 2019. Kernel 4.19.75-v7+

When connecting to AP -> kernel panic.

Any ideas?

thanks andrea

edimax dongle, chipset realtek RTL8188CUS

Code: Select all

Bus 001 Device 004: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS]
Bus 001 Device 005: ID 0424:7800 Standard Microsystems Corp.
Bus 001 Device 003: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 002: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
driver 8192cu

Code: Select all

Module                  Size  Used by
8192cu                606208  0

driver version v4.0.2_9000.20130911

Code: Select all

 $ modinfo 8192cu 
filename:       /lib/modules/4.19.75-v7+/kernel/drivers/net/wireless/realtek/rtl8192cu/8192cu.ko
version:        v4.0.2_9000.20130911
author:         Realtek Semiconductor Corp.
description:    Realtek Wireless Lan Driver
license:        GPL
srcversion:     6AD5C04A6CC39FDA305AE8F
alias:          usb:v0BDAp8186d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0789p016Dd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0DF6p0070d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v04BBp0950d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v06F8pE035d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2357p0100d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp2E2Ed*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v050Dp1004d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0E66p0020d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0E66p0019d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0846pF001d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0846p9021d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0B05p17ABd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0DF6p0061d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v20F4p624Dd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v050Dp21F2d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v050Dp2103d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v050Dp2102d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v4855p0091d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v07AAp0056d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v07B8p8178d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2019pAB2Bd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v7392p7822d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0586p341Fd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2001p330Dd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2001p3309d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2001p330Ad*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2001p3307d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2019p1201d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v04F2pAFFCd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v04F2pAFFBd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v04F2pAFF8d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v04F2pAFFAd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v04F2pAFF9d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v04F2pAFF7d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v13D3p3358d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v13D3p3359d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp317Fd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp0A8Ad*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:vCDABp8011d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v04BBp094Cd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp1E1Ed*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0B05p17BAd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:vCDABp8010d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2001p330Bd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2019pAB2Ed*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2019p4902d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0846p9043d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0846p9042d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0846p9041d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v4856p0091d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp5088d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0DF6p005Cd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v13D3p3357d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v4855p0090d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v20F4p648Bd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2019pAB2Ad*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v050Dp11F2d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v050Dp1102d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2001p3308d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v103Cp1629d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v06F8pE033d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0EB0p9071d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v07B8p8189d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v07B8p8188d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v7392p7811d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0DF6p0052d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v2019pED17d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v1058p0631d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp8191d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp817Cd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp8178d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp8177d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp17C0d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp018Ad*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp818Ad*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp817Fd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp8754d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp817Dd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp817Bd*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp817Ad*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp817Ed*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp8170d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp8176d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v0BDAp8191d*dc*dsc*dp*ic*isc*ip*in*
depends:        cfg80211
intree:         Y
name:           8192cu
vermagic:       4.19.75-v7+ SMP mod_unload modversions ARMv7 p2v8
parm:           rtw_ips_mode:The default IPS mode (int)
parm:           ifname:The default name to allocate for first interface (charp)
parm:           if2name:The default name to allocate for second interface (charp)
parm:           rtw_initmac:charp
parm:           rtw_channel_plan:int
parm:           rtw_chip_version:int
parm:           rtw_rfintfs:int
parm:           rtw_lbkmode:int
parm:           rtw_network_mode:int
parm:           rtw_channel:int
parm:           rtw_mp_mode:int
parm:           rtw_wmm_enable:int
parm:           rtw_vrtl_carrier_sense:int
parm:           rtw_vcs_type:int
parm:           rtw_busy_thresh:int
parm:           rtw_ht_enable:int
parm:           rtw_cbw40_enable:int
parm:           rtw_ampdu_enable:int
parm:           rtw_rx_stbc:int
parm:           rtw_ampdu_amsdu:int
parm:           rtw_lowrate_two_xmit:int
parm:           rtw_rf_config:int
parm:           rtw_power_mgnt:int
parm:           rtw_low_power:int
parm:           rtw_wifi_spec:int
parm:           rtw_special_rf_path:int
parm:           rtw_antdiv_cfg:int
parm:           rtw_enusbss:int
parm:           rtw_hwpdn_mode:int
parm:           rtw_hwpwrp_detect:int
parm:           rtw_hw_wps_pbc:int
parm:           rtw_max_roaming_times:The max roaming times to try (uint)
parm:           rtw_force_iol:Force to enable IOL (bool)
parm:           rtw_mc2u_disable:int
parm:           rtw_mac_phy_mode:int
parm:           rtw_80211d:int
parm:           rtw_notch_filter:0:Disable, 1:Enable, 2:Enable only for P2P (uint)

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