On Thu, Sep 05, 2013 at 08:40:52PM +0300, ville.syrjala@xxxxxxxxxxxxxxx wrote: > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > When transitioning away from vgacon the system tries to save the > current contents of the VGA memory, so that it can be cleanly handed > off to fbcon (or whatever comes afterwards). > > The recent change > > commit 81b5c7bc8de3e6f63419139c2fc91bf81dea8a7d > Author: Alex Williamson <alex.williamson@xxxxxxxxxx> > Date: Wed Aug 28 09:39:08 2013 -0600 > > i915: Update VGA arbiter support for newer devices > > caused i915 to disable VGA memory decode for the IGD when i915 is > initializing. Unfortunately that happens before the vgacon->fbcon > handoff so vgacon_save_screen() will read out all ones from the > VGA memory. > > After the handoff fbcon will inherit the bogus state from vgacon, > and pre-fills the fb with matching contents. The end result is > a white rectangle in the top left corner of the screen, the size > of which matches the now inactive VGA console. > > To remedy the situation delay the disabling of VGA memory until > the vgacon->fbcon handoff has happened. > > Also rename i915_enable_vga to i915_enable_vga_mem to make > the relationship between these functions clearer. > > Cc: Alex Williamson <alex.williamson@xxxxxxxxxx> > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Picked up for -fixes, thanks for the patch. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
