Disable MTRR support for PCIE G200SE cards, as it tickles hardware bugs.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/mga_driver.c b/src/mga_driver.c
index 9bb3ecf..3d172de 100644
--- a/src/mga_driver.c
+++ b/src/mga_driver.c
@@ -1477,6 +1477,14 @@ MGAPreInit(ScrnInfoPtr pScrn, int flags)
     memcpy(pMga->Options, MGAOptions, sizeof(MGAOptions));
     xf86ProcessOptions(pScrn->scrnIndex, pScrn->options, pMga->Options);
 
+    if (pMga->is_G200SE) {
+        /* Disable MTRR support on PCIe systems */
+        CARD32 temp = pciReadLong(pMga->PciTag, 0xDC);
+        if ((temp & 0x0000FF00) != 0x0) {
+            xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Disabling MTRR support.\n");
+            pScrn->options = xf86ReplaceBoolOption(pScrn->options, "MTRR", FALSE);
+        }
+    }
     
 #if !defined(__powerpc__)
     pMga->softbooted = FALSE;