[Bug 1404006] Re: grub2-themes-ubuntu-mate partially obscured submenus

[Christopher Chavez]

Using the default configuration, as of grub2 2.02~beta2-36 the edit
dialog seems to no longer be obscured as in the screenshot I had
uploaded in 2014: it is drawn over only a centered portion of the screen
(see new screenshot "unobscured edit dialog").

However, I've also found that if the GRUB_THEME="/boot/grub/themes
/ubuntu-mate/theme.txt" parameter is specified in /etc/default/grub,
then update-grub reports "Found theme: /boot/grub/themes/ubuntu-
mate/theme.txt", and the submenus use graphical rather than console
appearance, and are not obscured (see new screenshot "graphical
submenu").

I'm guessing the GRUB_THEME approach for setting the theme is what grub
recommends, and that the current method used (file
/usr/share/plymouth/themes/ubuntu-mate-logo/ubuntu-mate-logo.grub from
package plymouth-theme-ubuntu-mate-logo) is somehow insufficient, since
each approach seems to have a different effect on how grub.cfg is
generated.

So while there may be an issue in how grub is being configured to use
the theme (whether from the right package or using the right
configuration parameters), there might still be an inconsistency in how
grub itself mixes graphical and console interfaces, or fails to detect
improper theme configuration and fallback to providing a safe workaround
for the user.

** Attachment added: "graphical submenu"
   https://bugs.launchpad.net/ubuntu-mate/+bug/1404006/+attachment/4640333/+files/graphical%20submenu.png

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https://bugs.launchpad.net/bugs/1404006

Title:
  grub2-themes-ubuntu-mate partially obscured submenus

Status in ubuntu-mate:
  Confirmed
Status in grub2 package in Ubuntu:
  Incomplete
Status in grub2-themes-ubuntu-mate package in Ubuntu:
  Confirmed
Status in ubuntu-mate-artwork package in Ubuntu:
  New

Bug description:
  Using Ubuntu MATE, the included /etc/default/grub, and grub2-themes-
  ubuntu-mate (as of 0.3.6~trusty4 and 0.3.6~utopic4), sometimes the
  only portion of the submenus (and edit dialog, etc.) that is visible
  appears directly beneath where the top level menu "box" was; the rest
  is obscured by the "border", and the content appears "cropped"; i.e.,
  when I use the "Advanced options for Ubuntu" submenu, I probably won't
  see a menu of installed kernels, unless I have enough to appear within
  the visible area and/or my resolution is low enough. The applicable
  key controls are also invisible.

  As a workaround, if I hit Esc to get back to the top level menu, and
  go back into "Advanced…" there is no obscuring border any longer.

  This could be a bug with grub2 itself, and might apply to other
  themes; currently using 2.02~beta2-9ubuntu1 (trusty) and 2.02~beta2-15
  (utopic); will see what happens with 2.02~beta2-18.

  Note that update-grub warns that "Setting GRUB_TIMEOUT to a non-zero
  value when GRUB_HIDDEN_TIMEOUT is set is no longer supported" for the
  default config file.

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