@@ -123,6 +123,7 @@ static void RADEONGetMergedFBOptions(Scr
 static void RADEONSetDynamicClock(ScrnInfoPtr pScrn, int mode);
 static void RADEONForceSomeClocks(ScrnInfoPtr pScrn);
 static void RADEONSaveMemMapRegisters(ScrnInfoPtr pScrn, RADEONSavePtr save);
+static void RADEONSaveMode(ScrnInfoPtr pScrn, RADEONSavePtr save);
 
 #ifdef XF86DRI
 static void RADEONAdjustMemMapRegisters(ScrnInfoPtr pScrn, RADEONSavePtr save);
@@ -6450,6 +6453,9 @@ static Bool RADEONModeInit(ScrnInfoPtr p
 
     RADEONTRACE(("RADEONModeInit()\n"));
 
+/* some of the functions called in RADEONInit rely on some state already
+   set e.g. the TMDS_TRANSMITTER_CNTL must not be overwritten with 0 */
+    RADEONSaveMode(pScrn, &info->ModeReg);
     if (!RADEONInit(pScrn, mode, &info->ModeReg)) return FALSE;
 
     pScrn->vtSema = TRUE;
diff --git a/src/radeon_exa.c b/src/radeon_exa.c
diff --git a/src/radeon_exa_funcs.c b/src/radeon_exa_funcs.c
diff --git a/src/radeon_exa_render.c b/src/radeon_exa_render.c
diff --git a/src/radeon_macros.h b/src/radeon_macros.h
diff --git a/src/radeon_mergedfb.c b/src/radeon_mergedfb.c
diff --git a/src/radeon_mergedfb.h b/src/radeon_mergedfb.h
diff --git a/src/radeon_misc.c b/src/radeon_misc.c
diff --git a/src/radeon_mm_i2c.c b/src/radeon_mm_i2c.c
diff --git a/src/radeon_modes.c b/src/radeon_modes.c
index 70bf184..531247e 100644
--- a/src/radeon_modes.c
+++ b/src/radeon_modes.c