[Nouveau] [Bug 66255] Enabling Xinerama with nouveau driver causes Segmentation fault

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66255

--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Based on the backtrace, I think this is similar to bug #62914 -- try just
commenting out the offending lines from the xf86-video-nouveau driver, i.e.
something like

diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index b9b7164..8d782d3 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -346,11 +346,13 @@ drmmode_set_mode_major(xf86CrtcPtr crtc, DisplayModePtr
mode,
        drmmode_ConvertToKMode(crtc->scrn, &kmode, mode);

        fb_id = drmmode->fb_id;
+/*
 #ifdef NOUVEAU_PIXMAP_SHARING
        if (crtc->randr_crtc->scanout_pixmap)
                x = y = 0;
        else
 #endif
+*/
        if (drmmode_crtc->rotate_fb_id) {
                fb_id = drmmode_crtc->rotate_fb_id;
                x = 0;

You may also want to upgrade to 1.0.8 -- that has some zaphod-related fixes, I
think. (You're not enabling ZaphodHeads -- I think you should be, unless you're
only using a single monitor per video card.)

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