2013/9/6 Daniel Vetter <daniel@xxxxxxxx>: > 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. This patch causes "Unclaimed register" errors when you boot Haswell with only an eDP output... > -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 -- Paulo Zanoni _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
