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Wifi doesn't work on my Lenovo G50-80(Ubuntu 17.10.1). When I bought it was on windows os then I changed os to ubuntu and wifi doesn't work so I use a wired connection(LAN). Wifi didn't work with other Linux systems too. How can I fix it? Thanks

Daulet Aybaz
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  • Not exactly sure what "doesn't work" means. Does it not connect ? Does it not list networks ? Does it not turn on ? Does it turn on but fail to obtain an IP ? Anyway, first thing to check is that the wifi adapter is operational or if it is missing a firmware file ("driver" in windows speak). Can you open a terminal and type "dmesg" (without the quotes). The output will be a bit of a beast, but have a scroll through and see if you have any messages relating to missing firmware and/or inability to start your wifi adapter. – hatterman Feb 19 '18 at 13:03
  • [ 0.000000] [Firmware Bug]: TSC_DEADLINE disabled due to Errata; please update microcode to version: 0x20 (or later) – Daulet Aybaz Feb 19 '18 at 13:10
  • [ 1.229783] DMAR: Failed to find handle for ACPI object _SB.PCI0.SDMA [ 1.229788] DMAR: Failed to find handle for ACPI object _SB.PCI0.SDHC – Daulet Aybaz Feb 19 '18 at 13:12
  • [ 12.288042] Bluetooth: hci0 command 0x1003 tx timeout
    ////is that it?     – Daulet Aybaz Feb 19 '18 at 13:13
  • No, that last one is for bluetooth. Nothing there seems to relate to wifi. A few other things to check. Is your wifi enabled in your BIOS ? Also, type "lspci -v" in a terminal, is your wifi card listed ? If it is, it should also list what "driver" it is using. – hatterman Feb 19 '18 at 13:15
  • Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10) Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller Flags: bus master, fast devsel, latency 0, IRQ 47 I/O ports at 4000 [size=256] Memory at c0604000 (64-bit, non-prefetchable) [size=4K] Memory at c0600000 (64-bit, non-prefetchable) [size=16K] Capabilities: Kernel driver in use: r8169 Kernel modules: r8169 – Daulet Aybaz Feb 19 '18 at 13:17
  • Network controller: Broadcom Limited BCM43142 802.11b/g/n (rev 01) Subsystem: Lenovo BCM43142 802.11b/g/n Flags: fast devsel, IRQ 10 Memory at c0500000 (64-bit, non-prefetchable) [size=32K] Capabilities: – Daulet Aybaz Feb 19 '18 at 13:18
  • The "access denied" message is because you are not root. You can run the command again with "sudo lspci -v". So your wifi adapter is a Broadcom BCM43142. Let me do a quick google on firmware....... hang on. – hatterman Feb 19 '18 at 13:23
  • Ethernet controller:Capabilities: [40] Power Management version 3 Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Endpoint, MSI 01 Capabilities: [b0] MSI-X: Enable- Count=4 Masked- Capabilities: [d0] Vital Product Data Capabilities: [100] Advanced Error Reporting Capabilities: [140] Virtual Channel Capabilities: [160] Device Serial Number 01-00-00-00-68-4c-e0-00 Capabilities: [170] Latency Tolerance Reporting Capabilities: [178] L1 PM Substates – Daulet Aybaz Feb 19 '18 at 13:25
  • Network controller:Capabilities: [40] Power Management version 3 Capabilities: [58] Vendor Specific Information: Len=78 > Capabilities: [48] MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: [d0] Express Endpoint, MSI 00 Capabilities: [100] Advanced Error Reporting Capabilities: [13c] Virtual Channel Capabilities: [160] Device Serial Number 00-00-e2-ff-ff-ef-d8-5d Capabilities: [16c] Power Budgeting > ///thanks – Daulet Aybaz Feb 19 '18 at 13:26
  • "https://askubuntu.com/questions/765584/is-it-possible-to-use-broadcom-bcm43142-wifi-in-ubuntu-16-04" That link suggest turning off "secure boot" in the BIOS. If that doesn't work, it suggests using the "wl" driver, and gives details on how to install it. (sudo apt update && sudo apt install bcmwl-kernel-source). So, can you turn off "secure boot" in your BIOS and try again ? – hatterman Feb 19 '18 at 13:27
  • have you solved the problem ? Can you tell me what you did so I can put the solution for others to see ? – hatterman Feb 19 '18 at 14:10
  • Yes, sure. There is no Secure Boot in my BIOS, so I run the sudo apt-get update and sudo apt-get install bcmwl-kernel-source commands in a terminal. – Daulet Aybaz Feb 19 '18 at 14:15
  • And now it is working ? – hatterman Feb 19 '18 at 14:21
  • Yes, now it's working – Daulet Aybaz Feb 19 '18 at 14:24

1 Answers1

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The solution was taken from this post.

https://askubuntu.com/questions/765584/is-it-possible-to-use-broadcom-bcm43142-wifi-in-ubuntu-16-04%22

The solution was to install the bcmwl package.

sudo apt install bcmwl-kernel-source
hatterman
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