Ubuntu 18.04에서 Realtek 8821ae로 IP를 얻을 수 없습니다.

WiFi 연결에 문제가 있습니다. 네트워크는 볼 수 있지만 연결할 수는 없습니다.

사리

• 사용할 수있는 다른 네트워크를 볼 수는 있지만 연결할 수 없습니다.
• Ubuntu 18.04 (커널 4.18) 이중 부팅 Windows 10
• Realtek 8821ae
• Lenovo Ideapad 320
• WiFi 하드웨어는 Windows 10에서 작동합니다.

나는 노력했다.

• 거의 당신이이 주제에 대해 할 수있는 모든 인터넷 검색과이 포럼과 다른 사람들에 관한 관련 질문. 스택 교환
• Linux 커널 업그레이드
• 새 드라이버 설치
• 네트워크 관리자 대신 WICD로 변경
• 보안의 종류와 다른 종류의 네트워크

DHCPDISCOVER는 아무 것도 반환하지 않거나 'DHCPOFFERS를받지 못했습니다.'와 같이 DHCP 서버에서 IP 주소를받는 데 주된 문제가 있다는 것을 여러 가지 방법으로 볼 수 있습니다.

시스템에 대한 몇 가지 정보 :

$ sudo uname -a
Linux leon-Ubuntu 4.18.0-041800-lowlatency #201808122131 SMP PREEMPT Sun Aug 12 21:36:03 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

$ sudo lshw -C network
*-network                
   description: Wireless interface
   product: RTL8821AE 802.11ac PCIe Wireless Network Adapter
   vendor: Realtek Semiconductor Co., Ltd.
   physical id: 0
   bus info: pci@0000:01:00.0
   logical name: wlp1s0
   version: 00
   serial: b0:fc:36:2b:a5:2d
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
   configuration: broadcast=yes driver=rtl8821ae driverversion=4.18.0-041800-lowlatency firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11
   resources: irq:38 ioport:2000(size=256) memory:e8c00000-e8c03fff

$ lsmod | grep rtl8821ae
rtl8821ae             233472  0
btcoexist             155648  1 rtl8821ae
rtl_pci                32768  1 rtl8821ae
rtlwifi                86016  3 rtl_pci,rtl8821ae,btcoexist
mac80211              802816  3 rtl_pci,rtl8821ae,rtlwifi

$ ifconfig
wlp1s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
    ether b0:fc:36:2b:a5:2d  txqueuelen 1000  (Ethernet)
    RX packets 0  bytes 0 (0.0 B)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 0  bytes 0 (0.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

$ wconfig
wlp1s0    IEEE 802.11  ESSID:off/any  
      Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
      Retry short limit:7   RTS thr=2347 B   Fragment thr:off
      Encryption key:off
      Power Management:on

$ iwconfig wlp1s0 essid <network>
$ dhclient -v wlp1s0
Internet Systems Consortium DHCP Client 4.3.5
Copyright 2004-2016 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/wlp1s0/b0:fc:36:2b:a5:2d
Sending on   LPF/wlp1s0/b0:fc:36:2b:a5:2d
Sending on   Socket/fallback
DHCPDISCOVER on wlp1s0 to 255.255.255.255 port 67 interval 3 (xid=0x68e3751b)
DHCPDISCOVER on wlp1s0 to 255.255.255.255 port 67 interval 3
... etc
No DHCPOFFERS received.
No working leases in persistent database - sleeping.

$ dmesg # after network manager fails
[ 1283.623070] wlp1s0: authenticate with 68:72:51:42:67:36
[ 1283.623404] wlp1s0: send auth to 68:72:51:42:67:36 (try 1/3)
[ 1283.624978] wlp1s0: authenticated
[ 1283.630465] wlp1s0: associate with 68:72:51:42:67:36 (try 1/3)
[ 1283.642429] wlp1s0: RX AssocResp from 68:72:51:42:67:36 (capab=0x421 status=0 aid=2)
[ 1283.642726] wlp1s0: associated
[ 1283.643215] IPv6: ADDRCONF(NETDEV_CHANGE): wlp1s0: link becomes ready
[ 1329.024767] wlp1s0: deauthenticating from 68:72:51:42:67:36 by local choice (Reason: 3=DEAUTH_LEAVING)
[ 1329.064092] show_signal_msg: 29 callbacks suppressed
[ 1329.064095] dhcpcd[785]: segfault at 51 ip 0000559d9f6c26b0 sp 00007ffc2929e470 error 4 in dhcpcd5[559d9f6aa000+45000]
[ 1329.064102] Code: 85 e4 48 c7 44 24 14 00 00 00 00 48 8d 54 24 14 c7 44 24 1c 00 00 00 00 66 89 44 24 14 0f 85 d7 00 00 00 48 8b 87 b8 00 00 00 <44> 8b 28 48 8d 74 24 20 31 c0 b9 07 00 00 00 66 83 4b 06 04 48 89 
[ 1329.440910] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready

$ dmesg | grep -i firmware
[   14.517623] rtl8821ae: Using firmware rtlwifi/rtl8821aefw_29.bin
[   14.517631] rtl8821ae: Using firmware rtlwifi/rtl8821aefw_wowlan.bin

$ rfkill list all
0: ideapad_wlan: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: ideapad_bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: no
2: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
3: hci0: Bluetooth
    Soft blocked: yes
    Hard blocked: no

포인터, 수정 또는 솔루션을 가지고 있다면 많은 도움이 될 것입니다. 그리고 시스템에서 더 많은 데이터가 필요하면 알려주십시오.