diff -Nurp xserver-xorg-video-ati-6.12.99+git20090629.f39cafc5/src/radeon_dri.c xserver-xorg-video-ati-6.12.99+git20090629.f39cafc5-working/src/radeon_dri.c
--- xserver-xorg-video-ati-6.12.99+git20090629.f39cafc5/src/radeon_dri.c	2009-06-29 11:42:25.000000000 -0700
+++ xserver-xorg-video-ati-6.12.99+git20090629.f39cafc5-working/src/radeon_dri.c	2009-07-31 18:30:15.000000000 -0700
@@ -745,6 +745,8 @@ static radeon_agpmode_quirk radeon_agpmo
     { PCI_VENDOR_INTEL,0x2570,  PCI_VENDOR_ATI,0x4a4e,  PCI_VENDOR_DELL,0x5106,  4 },
     /* Intel 82865G/PE/P DRAM Controller/Host-Hub / RV280 [Radeon 9200 SE] Needs AGPMode 4 (lp #300304) */
     { PCI_VENDOR_INTEL,0x2570,  PCI_VENDOR_ATI,0x5964,  0x148c,0x2073,           4 },
+    /* Intel 82855PM host bridge / Mobility M7 LW Needs AGPMode 4 (lp: #353996) */
+    { PCI_VENDOR_INTEL,0x3340,  PCI_VENDOR_ATI,0x4c57, PCI_VENDOR_IBM,0x0530,    4 },
     /* Intel 82855PM Processor to I/O Controller / Mobility M6 LY Needs AGPMode 1 (deb #467235) */
     { PCI_VENDOR_INTEL,0x3340,  PCI_VENDOR_ATI,0x4c59,  PCI_VENDOR_IBM,0x052f,   1 },
     /* Intel 82855PM host bridge / Mobility 9600 M10 RV350 Needs AGPMode 1 (lp #195051) */