OpenWrt on Fitlet2 - unwanted reboots

I am using OpenWRT 19.0.7.3 (openwrt-19.07.3-x86-generic-combined-ext4.img) on Fitlet2 which is working quite well and the hardware has some really good features.

My system has rebooted twice the last couple of months and I am trying to find whats wrong :thinking:

I am getting the following error in "System Log", I guess I miss some specific drivers - anyone that can help me ?

Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.050795] ------------[ cut here ]------------
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.051063] WARNING: CPU: 3 PID: 1965 at 0xf85c0b48 [cfg80211@f85a6000+0x34000]
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.051508] Modules linked in: pppoe ppp_async iwlmvm iwldvm batman_adv qmi_wwan pppox ppp_generic nf_conntrack_ipv6 mac80211 iwlwifi iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_FLOWOFFLOAD xt_CT wireguard via_velocity via_rhine usbnet slhc sis900 r8169 pcnet32 nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_flow_table_hw nf_flow_table nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack ne2k_pci libcrc32c iptable_mangle iptable_filter ip_tables e1000e e100 crc_ccitt compat cdc_wdm bnx2 8390 8139too i2c_dev nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.055231]  3c59x igb e1000 ip6_udp_tunnel udp_tunnel natsemi button_hotplug tg3 ptp pps_core mii libphy
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.055751] CPU: 3 PID: 1965 Comm: rpcd Tainted: G        W       4.14.180 #0
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.056135] Hardware name: N/A N/A/N/A, BIOS FLT2.NBR.0.46.01.00 09/26/2018
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.056508] task: f17ff200 task.stack: f15ae000
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.056760] EIP: 0xf85c0b48 [cfg80211@f85a6000+0x34000]
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.057044] EFLAGS: 00010202 CPU: 3
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.057242] EAX: 00000000 EBX: 00000000 ECX: 00000001 EDX: 00000000
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.057579] ESI: f2129a80 EDI: f15afd00 EBP: f15afcdc ESP: f15afcc0
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.057917]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.058209] CR0: 80050033 CR2: 094ffb30 CR3: 30df3f60 CR4: 003406f0
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.058547] Call Trace:
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.058696]  ? 0xf819a880 [compat@f819a000+0x3000]
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.058957]  0xc161a019
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.059101]  ? 0xc1619d90
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.059252]  0xc1618d24
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.059395]  0xc16192dc
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.059538]  0xc1618620
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.059680]  0xc16189eb
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.059822]  ? 0xc16186b0
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.059974]  0xc15cffb7
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.060117]  ? 0xc16e1571
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.060270]  ? 0xf85a8250 [cfg80211@f85a6000+0x34000]
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.060544]  ? 0xc1486260
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.060695]  ? 0xc16e1ac7
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.060847]  ? 0xf85a8264 [cfg80211@f85a6000+0x34000]
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.061122]  ? 0xc1299265
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.061274]  ? 0xc1194ea8
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.061513]  ? 0xc11c8769
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.061673]  0xc15d0711
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.061830]  0xc15d116c
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.061989]  ? 0xc11755fe
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.062156]  0xc1002e7d
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.062310]  0xc16ec5ed
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.062479] EIP: 0xb7fdb556
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.062653] EFLAGS: 00000246 CPU: 3
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.062868] EAX: ffffffda EBX: 00000010 ECX: bfb27988 EDX: 00000000
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.063237] ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: bfb278fc
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.063611]  DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
Wed Oct  7 18:23:56 2020 kern.emerg kernel: [196843.063935] Code: 74 26 00 8b 9b c8 09 00 00 8d 80 a0 01 00 00 89 45 e8 89 d9 c0 e9 07 88 4d e7 e8 d4 b7 fe ff 85 c0 89 c3 75 1e 80 7d e7 00 74 18 <0f> 0b 89 f0 e8 0f 83 01 c9 b8 ea ff ff ff e9 da 00 00 00 8d 74
Wed Oct  7 18:23:56 2020 kern.warn kernel: [196843.065081] ---[ end trace 37f7b1d0b28ecbcb ]---

I have redone my testing with newer version of OpenWRT = openwrt-19.07.7-x86-generic-combined-ext4.img

I found out what the problem was, my problem started after I hade installed the Wifidrivers (opkg install iwlwifi-firmware-iwl8260c) it was the following package that was missing:

opkg install hostapd-basic

After that it seems to be really stable while booting in LEGACY and not UEFI.

I have found the following other packages that I think that the Fitlet2 wants:

opkg install kmod-ata-ahci kmod-sdhci kmod-i2c-i801

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