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xsrc/50353: Stippled regions rendered as black on i82810e using xf86-video-intel built with GCC 4.8.x
>Synopsis: Stippled regions rendered as black on i82810e using xf86-video-intel built with GCC 4.8.x
>Arrival-Date: Wed Oct 21 17:05:00 +0000 2015
>Originator: John D. Baker
>Release: NetBSD/i386-6.99.48 and later, following import of GCC 4.8.3+
NetBSD plexor 7.99.21 NetBSD 7.99.21 (PLEXOR) #6: Wed Oct 21 00:37:24 CDT 2015 sysop%skuld.technoskunk.fur@localhost:/d0/build/nbsd-tst/obj/i386/sys/arch/i386/compile/PLEXOR i386
As described in the thread starting here:
Machines with i82810e graphics using "xf86-video-intel" ("intel_drv.so")
built with GCC 4.8. render "stippled" regions (alternating
foreground/background colors) as black. Examples include:
X server root window when using "-retro" option
XTerm and XConsole scroll bars
twm active window title bars/inactive window frames
root window after 'xsetroot -mod x y ...' command
Back when GCC 4.5.x was still available, building "intel_drv.so" with
GCC 4.5 (modulo disabling SNA to work around an ICE) resulted in
correctly-rendered stippled regions.
On the off chance that compiler optimization was doing something
untoward, I built the driver with:
but the behavior did not change.
Install any NetBSD from 6.99.48 or later, built with GCC 4.8.x, on a
machine using i82810e graphics.
$ startx -- -retro
Observe black screen instead of X root weave pattern. XTerms have black
scroll-bar regions, 'twm' active window has black rectangle instead of
white/green lattice stippling in title bar.
If you roll back to a point at which things could still be built with
GCC 4.5.x, build "intel_drv.so", copy it into the GCC-4.8.x-built
system and re-start X. Stippled regions now render properly.
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