Fwd: X.org PCI changes breaks support for Silicon Motion SM720 Lynx3DM card?

Francisco Jerez currojerez at gmail.com
Mon Dec 1 02:37:25 PST 2008

"Richard Schwarting" <aquarichy at gmail.com> writes:

> Hello.
> I have a Silicon Motion SM720 Lynx3DM card which X in Ubuntu 8.10 (and
> Fedora 9) will not start on.  The log seems fine but ends with:
>  AddScreen/ScreenInit failed for driver 0
> The issue it experience seems to have been introduced by changes to X
> to use libpciaccess.
> Using GDB, and modified source littered with print statements, I see
> that it is failing like so:
> Xorg's dix/main.c's main() calls AddScreen(), which calls (*pfnInit)(...)
> pfnInit points to Silicon Motion's smi_driver.c's SMI_ScreenInit.
> SMI_ScreenInit calls SMI_MapMem().
> SMI_MapMem calls libpciaccess's common_interface.c's pci_device_map_range().
> It finds that the range that wants mapping is already mapped, and
> everything falls apart.
> The only other time pci_device_map_range() is called (and indeed for
> the same region) is earlier when
> dix.main.c's main() calls InitOutput(),
> InitOutput() called xf86Screen[0]->PreInit(...).
> PreInit pointed to Silicon Motion's smi_driver.c's SMI_PreInit()
> and SMI_PreInit calls SMI_MapMem (which maps the same region as later
> via pci_device_map_range()).
> So, I'm going to try and find out what the correct behaviour should be
> to fix it, but any hints would be gratefully appreciated.
> I've filed bug #18816
> (https://bugs.freedesktop.org/show_bug.cgi?id=18816) with regard to
> this.
> Cheers,
>  Richard Schwarting.
> _______________________________________________
> xorg mailing list
> xorg at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/xorg


Have you tried the driver version from the git repository? I think I
fixed this issue on commit c0447d33c82829248e642b3156fd9a3c0d0eb709.

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