Indeed it was in the mirror. Updated kernel. Now wifi works perfectly - the connection and the sites themselves, ssh, and the rest.
You can confirm this verification. Thanks. $ uname -a Linux tp-lenovo-b5400-ubuntu 3.13.0-29-generic #52-Ubuntu SMP Wed May 28 12:42:47 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux $ dmesg | grep rtl [ 16.459882] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin [ 16.486218] Modules linked in: uvcvideo snd_rawmidi i915(+) rt2x00lib rtl8723be lrw gf128mul btcoexist drm_kms_helper videobuf2_vmalloc videobuf2_memops joydev serio_raw glue_helper btusb ablk_helper cryptd crc_ccitt videobuf2_core rtl8723_common rtl_pci i2c_algo_bit snd_seq rtlwifi nvidia(POF) snd_seq_device mac80211 usbhid cfg80211 bluetooth snd_timer hid videodev wmi mei_me lpc_ich parport_pc snd drm mei ppdev soundcore lp parport video mac_hid psmouse ahci r8169 libahci mii [ 16.814133] ieee80211 phy0: Selected rate control algorithm 'rtl_rc' [ 16.814303] rtlwifi: wireless switch is on -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1320070 Title: Realtek Wifi card RTL8723BE drops connection with MSI enabled Status in “linux” package in Ubuntu: In Progress Status in “linux” source package in Trusty: Fix Committed Status in “linux” source package in Utopic: In Progress 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1320070/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp