Hello, I had this problem on a Dell T7600 running CentOS 7.6 and 8.2. The Dell does not have an embedded GPU so a PCIe one is used, typically Nvidia. The standard CentOS Nvidia driver does not work on a Dell T7***. You need to apply the Nvidia driver from their web site. Below are the detailed instructions for CentOS 7.6 Installation of Dell T7600 CentOS 7.6 Nvidia GPU Driver Make sure that the Dell T7600 is attached to a network. Install OS if required: Boot USB CentOS 7.6 distribution Use arrow keys to position to 'Install CentOS 7' Enter <Tab> Use arrow keys to insert at the end of boot command line: <space>nouveau.modeset=0<cr> Build CentOS 7.6 making sure that the network is enabled during the configuration phase Reboot making sure that the USB CentOS 7.6 distribution is removed Common procedure: At CentOS boot prompt enter <e> Use arrow keys to insert at end of line starting 'linux16': <space>nouveau.modeset=0 Enter <Ctrl+X> Log in, start a terminal window and become superuser Enter: yum -y update kernel-3.10.0-1160.11.1.el7.x86_64 Enter: cd /etc/default then edit the file grub Change: GRUB_DEFAULT=0 Append to GRUB_CMDLINE_LINUX before last ": <space>nouveau.modeset=0 Enter: grub2-mkconfig -o /boot/grub2/grub.cfg Enter: grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg Enter Browser and go to: www.nvidia.com/object/unix.html Download Nvidia Legacy Driver 390.138 and save * Reboot making sure the 1160.11 kernel is selected Log in, start a terminal window and become superuser Enter: yum -y groupinstall "Development Tools" Enter: yum -y install kernel-devel epel-release Enter: systemctl isolate multi-user.target Log in and become superuser Change directory to where the Nvidia driver was saved * Enter: sh NVIDIA-Linux-x86_64-* and answer Yes/Overwrite to everything Reboot making sure that the 1160.11 kernel is selected The procedure is now complete To check the driver is installed correctly: Log in, start a terminal window and become superuser Enter: lshw - numeric -C display The configuration line should have: driver=nvidia nvidia-settings can now be used to change display settings Regards, Mark Woolfson -----Original Message----- From: CentOS <centos-bounces at centos.org> On Behalf Of Kenneth Porter Sent: 11 January 2021 18:23 To: CentOS mailing list <centos at centos.org> Subject: [CentOS] Reboot/shutdown without login I installed CentOS 8 on a Dell server and it's been running fine as a headless system, admin'd remotely by ssh. Now I'd like to allow someone to shut it down at the console without logging in. Is there a way to do that? Or do I need to get the GUI working? I tried switching it into graphical mode ("systemctl isolate graphical") and the console freezes with nothing but a non-blinking text cursor at top left. The usual virtual console switching hotkeys (ctrl-alt F1-F7) don't do anything when it's hung like this. The system is still responsive in my ssh session. It doesn't recover if I switch back to multi-user target so I have to reboot it to make the console useful again. I'm guessing I'm lacking a good video driver. (It's an R720xd I inherited and the latest drivers on Dell's site are for RHEL 7.) _______________________________________________ CentOS mailing list CentOS at centos.org https://lists.centos.org/mailman/listinfo/centos