1
  • 3.19.0-26-generic #28-Ubuntu T
  • 01:05.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RS880 [Radeon HD 4200]
  • Hercules ProphetView monitor

This is a server, with no x-windows or gui. There's no dual-boot, or anything like that.

On boot I get the grub screen, then some boot messages, and then right after the hard drive messages the monitor switches to "Signal Over Range!!"

Editing /etc/default/grub and then doing a sudo update-grub doesn't seem to have any effect.

Grub config below (with "normal" comments removed):

GRUB_DEFAULT=0
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=false
GRUB_TIMEOUT=3
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="radeon.modeset=1"
GRUB_CMDLINE_LINUX=""
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"
GRUB_TERMINAL=console
GRUB_GFXMODE=1024x768
#GRUB_DISABLE_LINUX_UUID=true
#GRUB_DISABLE_RECOVERY="true"
#GRUB_INIT_TUNE="480 440 1"

The radeon.modeset is something new I tried this morning. It doesn't seem to have any effect.

5
  • Some quick googling indicates that your monitors native resolution is 1024 x 768 at 75 Hz , so that seems right as far as it goes, I think you also need to choose bits per pixel as in say 1024x768x32... You may find this a useful source of information: askubuntu.com/questions/18444/… based on the error however it sounds like the frquency range doesn't match your monitor.
    – Elder Geek
    Aug 23, 2015 at 15:42
  • adding depth (x32) had no impact. I'll check the thread you refer to to. Aug 23, 2015 at 16:02
  • vbeinfo as referred to in the thread I mentioned may prove useful as well as gnu.org/software/grub/manual/html_node/gfxpayload.html which you could change to text which would seem fine on a server IMHO
    – Elder Geek
    Aug 23, 2015 at 16:05
  • Related: askubuntu.com/questions/52910/…
    – Elder Geek
    Aug 23, 2015 at 16:21
  • Could you attach, say, another monitor to determine which frequencies (refresh and scan) does the video output have? Is there a valid video signal at all? Sep 11, 2015 at 14:49

1 Answer 1

0

You might try this:

GRUB_GFXMODE=1024x768x32
GRUB_GFXPAYLOAD_LINUX=keep

Other related info can be found below:

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .