Index: via_driver.c
===================================================================
--- via_driver.c	(wersja 793)
+++ via_driver.c	(kopia robocza)
@@ -708,14 +708,14 @@
             break;
         case VIA_K8M800:
             pVia->DRIIrqEnable = FALSE;
-            pVia->UseLegacyModeSwitch = TRUE;
+            //pVia->UseLegacyModeSwitch = TRUE;
             break;
         case VIA_PM800:
             pVia->VideoEngine = VIDEO_ENGINE_CME;
-            pVia->UseLegacyModeSwitch = TRUE;
+            //pVia->UseLegacyModeSwitch = TRUE;
             break;
         case VIA_VM800:
-            pVia->UseLegacyModeSwitch = TRUE;
+            //pVia->UseLegacyModeSwitch = TRUE;
             break;
         case VIA_K8M890:
             pVia->VideoEngine = VIDEO_ENGINE_CME;
@@ -1533,7 +1533,7 @@
                    "VM800 is currently not supported.\n");
         xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
                    "Using VBE to set modes to work around this.\n");
-        pVia->useVBEModes = TRUE;
+//        pVia->useVBEModes = TRUE;
     }
 
     pVia->pVbe = NULL;
@@ -2969,7 +2969,7 @@
     VIAPtr pVia = VIAPTR(pScrn);
     CARD32 Base;
 
-    DEBUG(xf86DrvMsg(scrnIndex, X_INFO, "VIAAdjustFrame\n"));
+    DEBUG(xf86DrvMsg(scrnIndex, X_INFO, "VIAAdjustFrame %dx%d\n",x,y));
 
     if (pVia->pVbe) {
         ViaVbeAdjustFrame(scrnIndex, x, y, flags);
Index: via_crtc.c
===================================================================
--- via_crtc.c	(wersja 793)
+++ via_crtc.c	(kopia robocza)
@@ -331,15 +331,19 @@
     CARD32 Base;
     CARD32 tmp;
 
+    DEBUG(xf86DrvMsg(pScrn->scrnIndex, X_INFO, "ViaFirstCRTCSetStartingAddress\n"));
+
     Base = (y * pScrn->displayWidth + x) * (pScrn->bitsPerPixel / 8);
     Base = Base >> 1;
 
     hwp->writeCrtc(hwp, 0x0C, (Base & 0xFF00) >> 8);
     hwp->writeCrtc(hwp, 0x0D, Base & 0xFF);
+    //if (!(pVia->Chipset == VIA_CLE266 && CLE266_REV_IS_AX(pVia->ChipRev)))
+    //    ViaCrtcMask(hwp, 0x48, Base >> 24, 0x1F);
+    /* CR34 are fire bits. Must be writed after CR0C CR0D CR48.  */
     hwp->writeCrtc(hwp, 0x34, (Base & 0xFF0000) >> 16);
 
-    if (!(pVia->Chipset == VIA_CLE266 && CLE266_REV_IS_AX(pVia->ChipRev)))
-        ViaCrtcMask(hwp, 0x48, Base >> 24, 0x0F);
+
 }
 
 void
@@ -352,6 +356,9 @@
     Base = (y * pScrn->displayWidth + x) * (pScrn->bitsPerPixel / 8);
     Base = (Base + pScrn->fbOffset) >> 3;
 
+
+    DEBUG(xf86DrvMsg(pScrn->scrnIndex, X_INFO, "ViaSecondCRTCSetStartingAddress: pScrn->fbOffset=%lu, Base=%lu\n",pScrn->fbOffset,Base));
+
     tmp = hwp->readCrtc(hwp, 0x62) & 0x01;
     tmp |= (Base & 0x7F) << 1;
     hwp->writeCrtc(hwp, 0x62, tmp);
@@ -555,7 +562,7 @@
     if (mode->CrtcHSyncStart > 4095)
         return MODE_BAD_HVALUE;
 
-    if ((mode->CrtcHSyncEnd - mode->CrtcHSyncStart) > 256)
+    if ((mode->CrtcHSyncEnd - mode->CrtcHSyncStart) > 512)
         return MODE_HSYNC_WIDE;
 
     if (mode->CrtcVTotal > 2049)
Index: via_cursor.c
===================================================================
--- via_cursor.c	(wersja 793)
+++ via_cursor.c	(kopia robocza)
@@ -297,6 +297,7 @@
         case VIA_P4M890:
         case VIA_P4M900:
         case VIA_VX800:
+        case VIA_VX855:
              if (pVia->pBIOSInfo->FirstCRTC->IsActive) {
                  VIASETREG(VIA_REG_HI_CONTROL0, 0x36000005);
              }
@@ -336,6 +337,7 @@
         case VIA_P4M890:
         case VIA_P4M900:
         case VIA_VX800:
+        case VIA_VX855:
              if (pVia->pBIOSInfo->FirstCRTC->IsActive) {
                  temp = VIAGETREG(VIA_REG_HI_CONTROL0);
                  VIASETREG(VIA_REG_HI_CONTROL0, temp & 0xFFFFFFFA);
@@ -377,6 +379,7 @@
         case VIA_P4M890:
         case VIA_P4M900:
         case VIA_VX800:
+        case VIA_VX855:
              if (pVia->pBIOSInfo->FirstCRTC->IsActive) {                
                  VIASETREG(VIA_REG_HI_POS0,    ((x    << 16) | (y    & 0x07ff)));
                  VIASETREG(VIA_REG_HI_OFFSET0, ((xoff << 16) | (yoff & 0x07ff)));
@@ -451,6 +454,7 @@
         case VIA_P4M890:
         case VIA_P4M900:
         case VIA_VX800:
+        case VIA_VX855:
              if (pVia->pBIOSInfo->FirstCRTC->IsActive) {
                  temp = VIAGETREG(VIA_REG_HI_CONTROL0);
                  VIASETREG(VIA_REG_HI_CONTROL0, temp & 0xFFFFFFFE);
@@ -502,6 +506,7 @@
         case VIA_P4M890:
         case VIA_P4M900:
         case VIA_VX800:
+        case VIA_VX855:
              if (pVia->pBIOSInfo->FirstCRTC->IsActive) {
                  temp = VIAGETREG(VIA_REG_HI_CONTROL0);
                  VIASETREG(VIA_REG_HI_CONTROL0, temp & 0xFFFFFFFE);