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ideanl
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Joined: 31 Mar 2013
Posts: 36

PostPosted: Mon Apr 01, 2013 5:07 pm    Post subject: GRUB2 Boot causes loss of signal to monitor Reply with quote

I have a Radeon HD 7770 on a UEFI system running Gentoo. When I boot from GRUB's menu entry, I get the loading message and the screen turns black with no signal received. When I hit 'c' to get to the GRUB2 command line, I can boot perfectly with the following commands:

Code:

insmod efi_gop
set root=(hd0,gpt2)
linux /kernel-3.6.11-gentoo root=/dev/sda5
boot


And this is my grub.cfg:

Code:

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub2-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  load_env
fi
set default="0"

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_gpt
insmod ext2
set root='hd0,gpt5'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt5 --hint-efi=hd0,gpt5 --hint-baremetal=ahci0,gpt5  0f3e50df-2670-49ca-a3fe-8eae8373b5e0
else
  search --no-floppy --fs-uuid --set=root 0f3e50df-2670-49ca-a3fe-8eae8373b5e0
fi
    font="/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
  set gfxmode=auto
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=
  insmod gettext
fi
terminal_output gfxterm
if sleep --interruptible 0 ; then
  set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Gentoo GNU/Linux' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-0f3e50df-2670-49ca-a3fe-8eae8373b5e0' {
   load_video
   insmod gzio
   insmod part_gpt
   insmod efi_gop
   insmod ext2
   set root='hd0,gpt5'
   if [ x$feature_platform_search_hint = xy ]; then
     search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt5 --hint-efi=hd0,gpt5 --hint-baremetal=ahci0,gpt5  0f3e50df-2670-49ca-a3fe-8eae8373b5e0
   else
     search --no-floppy --fs-uuid --set=root 0f3e50df-2670-49ca-a3fe-8eae8373b5e0
   fi
   echo   'Loading Linux 3.6.11-gentoo ...'
   linux   /boot/kernel-3.6.11-gentoo root=/dev/sda5 ro 
}
submenu 'Advanced options for Gentoo GNU/Linux' $menuentry_id_option 'gnulinux-advanced-0f3e50df-2670-49ca-a3fe-8eae8373b5e0' {
   menuentry 'Gentoo GNU/Linux, with Linux 3.6.11-gentoo' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.6.11-gentoo-advanced-0f3e50df-2670-49ca-a3fe-8eae8373b5e0' {
      load_video
      insmod gzio
      insmod part_gpt
      insmod ext2
      set root='hd0,gpt5'
      if [ x$feature_platform_search_hint = xy ]; then
        search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt5 --hint-efi=hd0,gpt5 --hint-baremetal=ahci0,gpt5  0f3e50df-2670-49ca-a3fe-8eae8373b5e0
      else
        search --no-floppy --fs-uuid --set=root 0f3e50df-2670-49ca-a3fe-8eae8373b5e0
      fi
      echo   'Loading Linux 3.6.11-gentoo ...'
      linux   /boot/kernel-3.6.11-gentoo root=/dev/sda5 ro 
   }
   menuentry 'Gentoo GNU/Linux, with Linux 3.6.11-gentoo (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.6.11-gentoo-recovery-0f3e50df-2670-49ca-a3fe-8eae8373b5e0' {
      load_video
      insmod gzio
      insmod part_gpt
      insmod ext2
      set root='hd0,gpt5'
      if [ x$feature_platform_search_hint = xy ]; then
        search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt5 --hint-efi=hd0,gpt5 --hint-baremetal=ahci0,gpt5  0f3e50df-2670-49ca-a3fe-8eae8373b5e0
      else
        search --no-floppy --fs-uuid --set=root 0f3e50df-2670-49ca-a3fe-8eae8373b5e0
      fi
      echo   'Loading Linux 3.6.11-gentoo ...'
      linux   /boot/kernel-3.6.11-gentoo root=/dev/sda5 ro single
   }
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows 8'{
chainloader /efi/Microsoft/Boot/bootmgfw.efi
}
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###



I have been messing around with my kernel configuration in order to get the proper graphics modules for my Radeon HD 7770. Recently, I had to boot with nomodeset because I would hang at "Waiting for uevents to be processed" . I fixed that problem but I am left with the problem above. Here is my .config for my kernel configuration in case I have a problem with the graphics driver modules: http://labibij.hulk.osd.wednet.edu/files/CONFIG
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