[Openchrome-devel] [Bug 95420] Driver 0.4.0 crashes with recent linux kernel version

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95420

--- Comment #4 from Kevin Brace <kevinbrace at gmx.com> ---
(In reply to Xavier Bachelot from comment #3)

Hi Xavier,

> I still got both the FB mapping error and a segfault with latest git
> (0.4.176) and kernel 4.5.6. while everything works with kernel 4.4.9. Fully
> updated Fedora 23 with VIA Epia-M (CLE266).
> 
> [   118.791] (II) CHROME(0): Entered viaMapFB.
> [   118.791] (--) CHROME(0): Mapping a frame buffer at address 0xd8000000
> with size 0x4000000.
> [   118.793] (EE) CHROME(0): Unable to map a frame buffer.
> Error: Invalid argument (22)
> [   118.793] (II) CHROME(0): Exiting viaMapFB.
> [   118.793] (II) CHROME(0): VIAFreeRec
> [   118.793] (II) CHROME(0): Entered viaUnmapMMIO.
> [   118.793] (II) CHROME(0): Entered viaMMIODisable.
> [   118.793] (II) CHROME(0): Exiting viaMMIODisable.
> [   118.793] (II) CHROME(0): Exiting viaUnmapMMIO.
> [   118.793] (II) CHROME(0): VIAFreeScreen
> [   118.793] (II) CHROME(0): VIAFreeRec
> [   118.793] (EE) 
> [   118.793] (EE) Backtrace:
> [   118.797] (EE) 0: /usr/libexec/Xorg (OsLookupColor+0x146) [0x81fb606]
> [   118.803] (EE) 1: ? (?+0x146) [0xb76e0ec1]
> [   118.806] (EE) 2: /usr/lib/xorg/modules/drivers/openchrome_drv.so
> (VIAFreeScreen+0x33) [0xb690ae23]
> [   118.810] (EE) 3: /usr/libexec/Xorg (xf86DeleteScreen+0x67) [0x80cb197]
> [   118.812] (EE) 4: /usr/libexec/Xorg (InitOutput+0xdfa) [0x80c522a]
> [   118.816] (EE) 5: /usr/libexec/Xorg (remove_fs_handlers+0x31a) [0x807e74a]
> [   118.819] (EE) 6: /usr/libexec/Xorg (miPolyFillRect+0x2da) [0x8066f8a]
> [   118.829] (EE) 7: /lib/libc.so.6 (__libc_start_main+0xf5) [0xb705d545]
> [   118.831] (EE) 8: /usr/libexec/Xorg (_start+0x21) [0x8066d26]
> [   118.833] (EE) 
> [   118.833] (EE) Segmentation fault at address 0x10c

I have not fundamentally changed the code from the older version to the newer
one.
As I may have said in another reply for this subject, is this Linux kernel or
libpciaccess problem?
Perhaps, you can remove PCI_DEV_MAP_FLAG_WRITE_COMBINE to see if it helps.

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