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menu_entry: Disable cursor during update_screen()

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When running grub in a VGA console of a KVM pseries guest on PowerPC,
you can see the cursor sweeping over the whole line when entering a
character in editor mode. This is visible because grub always refreshes
the whole line when entering a character in editor mode, and drawing
characters is quite a slow operation with the firmware used for the
powerpc pseries guests (SLOF).
To avoid this ugliness, the cursor should be disabled when refreshing
the screen contents during update_screen().

Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Thomas Huth 2016-01-29 15:26:58 +01:00 committed by Andrei Borzenkov
parent e3745f9087
commit 625934ec0f
1 changed files with 4 additions and 0 deletions
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4
grub-core/normal/menu_entry.c
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@ -254,6 +254,8 @@ update_screen (struct screen *screen, struct per_term_screen *term_screen,
mode = ALL_LINES;
}
grub_term_setcursor (term_screen->term, 0);
if (mode != NO_LINE)
{
/* Draw lines. This code is tricky, because this must calculate logical
@ -361,6 +363,8 @@ update_screen (struct screen *screen, struct per_term_screen *term_screen,
}
grub_term_setcursor (term_screen->term, 1);
grub_term_refresh (term_screen->term);
}