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-rw-r--r--man/radeon.man5
-rw-r--r--src/radeon_dri.c8
2 files changed, 8 insertions, 5 deletions
diff --git a/man/radeon.man b/man/radeon.man
index b0a4f041..d8620faa 100644
--- a/man/radeon.man
+++ b/man/radeon.man
@@ -177,8 +177,9 @@ The default is to
.B leave it unchanged.
.TP
.BI "Option \*qAGPFastWrite\*q \*q" boolean \*q
-Enable or disable AGP fast writes. Enabling this is frequently the cause of
-instability. Used only when the DRI is enabled.
+Enable AGP fast writes. Enabling this is frequently the cause of
+instability. Used only when the DRI is enabled. If you enable
+this option you will get *NO* support from developers.
.br
The default is to
.B leave it unchanged.
diff --git a/src/radeon_dri.c b/src/radeon_dri.c
index 35e41545..39c72dbe 100644
--- a/src/radeon_dri.c
+++ b/src/radeon_dri.c
@@ -739,8 +739,9 @@ static Bool RADEONSetAgpMode(RADEONInfoPtr info, ScreenPtr pScreen)
from = X_DEFAULT;
if (xf86GetOptValInteger(info->Options, OPTION_AGP_MODE, &info->agpMode)) {
- if (info->agpMode < is_v3 ? 4 : 1 || info->agpMode > is_v3 ? 8 : 4 ||
- info->agpMode & (info->agpMode - 1)) {
+ if ((info->agpMode < (is_v3 ? 4 : 1)) ||
+ (info->agpMode > (is_v3 ? 8 : 4)) ||
+ (info->agpMode & (info->agpMode - 1))) {
xf86DrvMsg(pScreen->myNum, X_ERROR,
"Illegal AGP Mode: %d (valid values: %s), leaving at "
"%dx\n", info->agpMode, is_v3 ? "4, 8" : "1, 2, 4",
@@ -753,7 +754,7 @@ static Bool RADEONSetAgpMode(RADEONInfoPtr info, ScreenPtr pScreen)
xf86DrvMsg(pScreen->myNum, from, "Using AGP %dx\n", info->agpMode);
- info->agpFastWrite = (agp_status & RADEON_AGP_FW_MODE);
+ info->agpFastWrite = 0; // Always off by default as it sucks
from = xf86GetOptValInteger(info->Options, OPTION_AGP_FW,
&info->agpFastWrite) ? X_CONFIG : X_DEFAULT;
@@ -794,6 +795,7 @@ static Bool RADEONSetAgpMode(RADEONInfoPtr info, ScreenPtr pScreen)
}
if (info->agpFastWrite) mode |= RADEON_AGP_FW_MODE;
+ else mode &= ~RADEON_AGP_FW_MODE;
xf86DrvMsg(pScreen->myNum, X_INFO,
"[agp] Mode 0x%08lx [AGP 0x%04x/0x%04x; Card 0x%04x/0x%04x]\n",