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
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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1320070
Title:
Realtek Wifi card RTL8723BE drops connection with MSI enabled
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Trusty:
Fix Released
Status in linux source package in Utopic:
Fix Released
Bug description:
As my testing result with ThinkPad E540 and other users' report[1],
RTL8723BE drops connection with MSI enabled, need to backport
329d6e299f92a591acb3a80f6d597a5f9dce7e6d "rtlwifi: rtl8723be: disable
MSI interrupts mode"
[1] https://bugs.launchpad.net/bugs/1240940
Tips for RTL8188EE [10ec:8179] and RTL8723BE [10ec:b723] users: those
hardware modules have MSI compatibility issue, on some certain
platforms they work fine with MSI but break connections without MSI,
on some other certain platforms it's opposite. You could try to toggle
its module parameter "msi"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1296591
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https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1320070/+subscriptions
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