Help: "XF86DGAGetVideo:failed to map video memory". I used libXxf86dga-1.1.1 on Ubuntu 10.04 on intel GMA 4500MHD(Intel GM45 chipset)

Focus.Luo luoyanqing at
Mon Oct 10 18:12:20 PDT 2011

Hi all,

1, Does the intel GM45 chipset support DGA(direct graphic access)?

2, If it supports, why I used the function XF86DGAGetVideo(dis, DefaultScreen(dis), &addr, &width, &bank, &ram); and It returen "XF86DGAGetVideo:failed to map video memory". But I used the function XF86DGAQueryDirectVideo, It work well. Does somebody can help me?


DGA(direct graphic access) Lib: libXxf86dga-1.1.1

Xserver: xorg

Graphic Driver: 2.9.1

OS: Ubuntu 10.04

Gpaphic: intel GMA 4500MHD(Intel GM45 chipset)

Focus Luo
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