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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [PRIME] Xorg segfaults during startup when loading the xf86-video-ati driver"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=90187#c4">Comment # 4</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [PRIME] Xorg segfaults during startup when loading the xf86-video-ati driver"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=90187">bug 90187</a>
              from <span class="vcard"><a class="email" href="mailto:dex+fdobugzilla@dragonslave.de" title="dex+fdobugzilla@dragonslave.de">dex+fdobugzilla@dragonslave.de</a>
</span></b>
        <pre>Hope this helps:

(gdb) bt f
#0  0x00007fb6a51c3ed7 in drmmode_set_desired_modes (pScrn=0xd6b470,
drmmode=0xd71cb8, set_hw=0) at drmmode_display.c:2154
        crtc = 0xe0f0c0
        drmmode_crtc = 0xe0fb90
        output = 0x0
        o = 0
        config = 0xe0ef50
        c = 0
#1  0x00007fb6a51b7c61 in RADEONCreateScreenResources_KMS (pScreen=0xd69520) at
radeon_kms.c:251
        pScrn = 0xd6b470
        info = 0xd71a30
        pixmap = 0x7fb6a869f2a0 <__glXDRI2Provider+16>
        surface = 0x12adf10
#2  0x00000000004df9b4 in xf86CrtcCreateScreenResources (screen=0xd69520) at
xf86Crtc.c:709
        scrn = 0xd6b470
        config = 0xe0ef50
#3  0x00000000004459a1 in dix_main (argc=1, argv=0x7ffe59115698,
envp=0x7ffe591156a8) at main.c:213
        pScreen = 0xd69520
        i = 0
        alwaysCheckForInput = {0, 1}
#4  0x00000000004286a1 in main (argc=1, argv=0x7ffe59115698,
envp=0x7ffe591156a8) at stubmain.c:34
No locals.</pre>
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