Warning: if you have the right kind of computer (with an Intel Skylake processor), Linux will not successfully boot after certain updates. This is a good description of the Fedora version of the problem: <https://www.happyassassin.net/2016/07/07/psa-failure-to-boot-after-kernel-update-on-skylake-systems/> It affects other distros too. I don't know all the hardware it affects, but it includes a bunch of notebooks: Lenovo Thinkpad T460, Lenovo Thinkpad x260, Lenovo Yoga 260, ASUS ZenBook UX305CA, Asus ZenBook UX303UB, Samsung Notebook 9. <https://bugzilla.redhat.com/show_bug.cgi?id=1353103> I was able to fix this on my UX305ca. - there is a firmware update "300" that fixes the problem - install the firmware update from Windows (I didn't try to figure out how to do it without Windows) - the Asus GUI tool for update discovery and installation does not find it. I guess that Asus thinks firmware updates are dangerous. - go to the website with downloads for the UX305ca <http://www.asus.com/us/Notebooks/ASUS-ZenBook-UX305CA/HelpDesk_Download/> - Under the "BIOS" expandable item, find and download "BIOS 300". Unzip it. - you also need the WinFlash (a separate download under BIOS-Utilities). I had previously installed it to flash BIOS 205. Run it, pointing it at the unzipped BIOS 300. - NOTE: (discovered the hard way) the firmware flashing will change at least some of the firmware settings that you made. The one that bit me: I need Secure Boot to be disabled because I'm using unsigned kernels (to work around the i2c bus problems Linux has with Skylake). When I booted with SB on, I got the infamously inscrutable "double free" message from grub: <https://bugzilla.redhat.com/show_bug.cgi?id=1292615> (Notice who posted this bug.)