my machin is thinkpad-E550 and #48 worked for me. uname -a Linux ThinkPad 3.19.0-25-generic #26~14.04.1-Ubuntu SMP Fri Jul 24 21:16:20 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
BUT MODULE VERIFICATION FAILED! signature is not validu!??? please explain what should i do? $ dmesg | grep rtl [ 10.250033] rtlwifi: module verification failed: signature and/or required key missing - tainting kernel [ 10.510565] Using firmware rtlwifi/rtl8723befw.bin [ 10.513766] ieee80211 phy0: Selected rate control algorithm 'rtl_rc' [ 10.514272] rtlwifi: wireless switch is on lspci -v u04:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter Subsystem: Lenovo Device b736 Flags: bus master, fast devsel, latency 0, IRQ 18 I/O ports at 4000 [size=256] Memory at f1200000 (64-bit, non-prefetchable) [size=16K] Capabilities: [40] Power Management version 3 Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Endpoint, MSI 00 Capabilities: [100] Advanced Error Reporting Capabilities: [140] Device Serial Number 00-23-b7-fe-ff-4c-e0-00 Capabilities: [150] Latency Tolerance Reporting Capabilities: [158] L1 PM Substates Kernel driver in use: rtl8723be -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1320070 Title: Realtek Wifi card RTL8723BE drops connection with MSI enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1320070/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs