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Happy New Year, hopefully.

Earlier today I tried to update my kernel from 3.13xx to 4.2 in the hope of better performance on my computer. But after a restart I had no network. When i did ifconfig ethx/wlanx up it gave an error message. I had to remove the new kernel and reboot the old kernel to get the network back.

How do I keep the network drivers between kernels? Does not the dependencies hop along between kernels?

Perhaps a better question would be - what are the appropriate steps to install a kernel and keeping the drivers working between kernel-generations? If there is a manual I would read it, but I have not found Potters book of knowledge where all the magick Linux are collected in one large volume. In this case I would like to read the chapter x.x.x.IV Kernel Update do and do not.

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  • How did you install the 4.2 kernel? Wired or wireless networking? What type of card? What driver?
    – fkraiem
    Commented Dec 31, 2015 at 15:51
  • Have you confirmed it is a driver issue specifically (rather than, for example, a change in the interface naming convention)? What was the error message? Commented Dec 31, 2015 at 15:53
  • What packages did you update? There are "lts" kernel upgrade packages, but I did a successful update of my 14.04 to 4.2.3 with just the kernel package and the firmware package. You need more than just the kernel package.
    – ubfan1
    Commented Dec 31, 2015 at 16:12
  • Hi I did apt-cache search linux-image THEN sudo apt-get install linux-image-4.2.0-22-generic I will have to do another update to see the error message:) That solution came from another place on the internet. Perhaps from another thread on this site. Wireless update I cannot give you new line
    – no mouse
    Commented Dec 31, 2015 at 16:22
  • WIRELESS 02:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01) ETHERNET 01:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM57786 Gigabit Ethernet PCIe (rev 01) ______I only updated the kernel and no other packages because the network has worked when the kernels have been updated before within the 3.-branch of kernels ____when the kernels have been updated automatically they have always been the GENERIC
    – no mouse
    Commented Dec 31, 2015 at 16:28

1 Answer 1

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@fkraiem
That solved the problem.

Install linux-image-generic-lts-wily, this will 1) install linux-image-extra-4.2.0-22-generic, which may contain the driver for your wifi card, and 2) ensure you get all updates for the 4.2 series of kernels. – fkraiem 3 hours ago

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