I do have a similar problem with display port. Grub set-up is correct
since the error is only seen when using DP1.2 (and not DP1.1)
See also: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1853735
Regards
On Sun, 13 Jul 2014 14:54:48 -0400 js <jsh...@yahoo.com> wrote:
> Package: grub2
> Version: 2.00-22
> Severity: normal
>
> Dear Maintainer,
>
>
>
=============================================================================================
>
> When my system is connected to a monitor with both a DVI cable and a
dislayport cable,
> the system boots fine and after the BIOS screen I see the grub menu,
can select the linux
> kernel to use and it boots without issue.
>
> However, if the system is connected to the monitor with only the
displayport cable but no DVI,
> I still see the system BIOS screen after powering up, but then the
grub menu no longer appears
> and the system does not boot. I verified this by checking
/var/log/{syslog,messages,boot} after
> rebooting with the DVI cable inserted.
>
> If the system is connected to the monitor using only an HDMI cable,
then again I see the BIOS
> screens, the GRUB menu is not visible but the system does boot and I
can login via ssh.
>
> It seems this issue is restricted to using a displayport cable and
grub, as even the default
> kernel in grub.cfg was not booted in this case, although it did boot
when using only HDMI.
>
> [The system boots into a console without starting X and the console
is not visible if the
> monitor input is either displayport or HDMI.]
>
> Here is the /etc/default/grub contents even though grub.cfg is
attached as well
>
> # If you change this file, run 'update-grub' afterwards to update
> # /boot/grub/grub.cfg.
> # For full documentation of the options in this file, see:
> # info -f grub -n 'Simple configuration'
>
> GRUB_DEFAULT=0
>
> GRUB_DEFAULT="Advanced options for Debian GNU/Linux>Debian GNU/Linux,
with Linux 3.2.0-4-686-pae"
> GRUB_TIMEOUT=11
>
> GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
> GRUB_CMDLINE_LINUX_DEFAULT="quiet"
> GRUB_CMDLINE_LINUX="splash nomodeset vga=normal loglevel=5"
> GRUB_BACKGROUND=/boot/grub/splash_images/js-active.png
>
> GRUB_GFXMODE=1600x1200x16,1600x1200,800x600x16,800x600,640x480,auto
> GRUB_GFXPAYLOAD_LINUX=text
>
> # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter
to Linux
> GRUB_DISABLE_LINUX_UUID=true
>
>
=============================================================================================
>
>
> -- Package-specific info:
>
> *********************** BEGIN /proc/mounts
> /dev/sda1 / ext4
rw,relatime,errors=remount-ro,user_xattr,barrier=1,data=ordered 0 0
> /dev/sda3 /boot ext4 rw,relatime,user_xattr,barrier=1,data=ordered 0 0
> /dev/sda2 /usr1 ext4 rw,relatime,user_xattr,barrier=1,data=ordered 0 0
> /dev/sdb1 /usr2 ext4 rw,relatime,user_xattr,barrier=1,data=ordered 0 0
