> -----Original Message----- > From: CentOS [mailto:centos-bounces at centos.org] On Behalf Of Johnny > Hughes > Sent: den 21 februari 2018 18:03 > To: centos at centos.org > Subject: Re: [CentOS] CentOS 7 1708 won't boot after grub2 update > > On 02/21/2018 12:44 AM, Sorin Srbu wrote: > >> -----Original Message----- > >> From: CentOS [mailto:centos-bounces at centos.org] On Behalf Of Warren > >> Young > >> Sent: den 20 februari 2018 17:01 > >> To: CentOS mailing list <centos at centos.org> > >> Subject: Re: [CentOS] CentOS 7 1708 won't boot after grub2 update > >> > >> On Feb 19, 2018, at 5:00 AM, Sorin Srbu <sorin.srbu at ilk.uu.se> wrote: > >>> > >>> This is the third fresh install of CentOS 7 1708 the last two months that > >>> won't boot after a regular "yum update" just after the fresh install has > >>> finished. > >> > >> Define “won’t boot”. Does it stop: > >> > >> 1. Before the GRUB2 screen? > >> 2. Between the GRUB2 screen and root device mount? > >> 3. After root device mount but before entering runlevel 5? > >> 4. Something else? > > > > Not really sure. > > A few times the screen just went black after the grub menu, a few times it > stuck waiting on Plymouth to quit. > > > > As for a screenshoot, I'll see if I can find another unused box to try > reproducing this on. Don't want to mess up this particular machine. > > > This sounds like some kind of graphics card issue .. if you see any text > that says 'booting CentOS' or a line at the bottom or the '7' grey boot > screen, you are past the Grub2 stage. > > Are these machines running X windows and a Desktop Environment. > > If I had to guess, this is an AMD graphics issue .. or possibly another > brand of card. Thanks for the feedback. No gray 7-boot screen. Might be a graphics issue, the card is a Nvidia 1060 with no particular drivers loaded except for the default Nouveau package. What's weird is that I can't even get a CLI login screen with ctrl-alt-Fx at this point. Will continue trouble-shooting and see if I can resolve this properly. //Sorin