[Nouveau] [Bug 62916] New: NVEnterTV fails on hybrid cards

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=62916

          Priority: medium
            Bug ID: 62916
          Assignee: nouveau at lists.freedesktop.org
           Summary: NVEnterTV fails on hybrid cards
        QA Contact: xorg-team at lists.x.org
          Severity: critical
    Classification: Unclassified
                OS: Linux (All)
          Reporter: zeng.shixin at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

Since on system with hybrid cards, the nvidia card might not be connecting to
the screen, so Xf86SetDisiredMode could fail, which results in a fatal error
for Xserver:
[ 91825.257] (II) NOUVEAU(G0): NVEnterVT is called.
[ 91825.258] 
Fatal server error:
[ 91825.258] EnterVT failed for gpu screen 0


The following dirty hack fixes the problem. We should check for the connected
screen before setting mode, but I don't know how to do that, since this is my
first time to look at nouveau code.

--- nv_driver-orig.c    2013-03-29 17:19:34.876953461 -0400
+++ nv_driver.c    2013-03-29 17:20:15.810287942 -0400
@@ -407,8 +407,7 @@
     if (ret)
         ErrorF("Unable to get master: %s\n", strerror(errno));

-    if (!xf86SetDesiredModes(pScrn))
-        return FALSE;
+    xf86SetDesiredModes(pScrn);

     if (pNv->overlayAdaptor && pNv->Architecture != NV_ARCH_04)
         NV10WriteOverlayParameters(pScrn);

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