Recently ran into a situation where I need to install headless TeamViewer on a CentOS 7 server on Linode. This requires /dev/fb0 in order to function.

So far it has not been clear on how to enable the framebuffer (/dev/fb0). What do we need to do to install kernel support for a virtual machine?

2 Answers 2


I know this is old question, but still valid. In order to have /dev/fb0 you need to have the frame-buffer enabled in your kernel.

To check you can grep it from kernel configuration (from currently running grep CONFIG_FB_ /boot/config-3.10.0-693.17.1.el7.x86_64

For virtual environment you probably need VESA enabled so you add grep VESA and you should get the following output:

# CONFIG_FB_UVESA is not set

If you have this configured you will see the device /dev/fb0

Note: For older kernels like 4.9 you may need to add vga=0x317 in the command-line.

  • Thanks, yeah, it was enabled in the kernel. I don't have the details any longer, but thanks for the post. I think the VESA info probably would have helped, but can't be sure now.
    – ylluminate
    Apr 11, 2018 at 22:39
  • @ylluminate ah pitty that you don't have the details now. I hope it will work if anyone needs it.
    – tukan
    Apr 12, 2018 at 7:39
  • This isn't enough for me.
    – konsolebox
    Jun 26 at 5:54
  • @konsolebox what does that mean?
    – tukan
    Jun 26 at 9:07
  • @tukan /dev/fb0 didn't populate until I specified vga=0x317 in the command-line.
    – konsolebox
    Jun 26 at 11:44

This works for me.

Perform steps as root:

  1. systemctl set-default multi-user.target

  2. append vga=0x317 to GRUB_CMDLINE_LINUX line in /etc/default/grub.conf

  3. grub2-mkconfig -o /boot/grub2/grub.cfg

  4. add the user to the 'video' group in /etc/group

  5. reboot

Perform as user:

  1. id

    uid=1000(mario) gid=1000(mario) groups=1000(mario),39(video)

ensure in video group (if not yet rebooted, log out and back in)

  • Retracting my previous comment. vga=0x317 did it.
    – konsolebox
    Jun 26 at 6:06

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