Full patch below. This incorporates Dan Christensen's suggested changes,
with relatively florid commentary.
$Id: 044_chips_default_to_noaccel_on_69k.diff 189 2005-06-11 00:04:27Z branden $
This patch by Nathanael Nerode, based on
original patches from Mike A. Harris and Dan Christensen.
Index: xc/programs/Xserver/hw/xfree86/drivers/chips/ct_driver.c
===================================================================
--- xc/programs/Xserver/hw/xfree86/drivers/chips/ct_driver.c (revision 309)
+++ xc/programs/Xserver/hw/xfree86/drivers/chips/ct_driver.c (working copy)
@@ -1492,8 +1492,28 @@
"rgb bits %d\n", val);
}
}
+ /* FIXME: Disable 2D acceleration on C&T 69000 by default, since it is
+ * reported to be broken, but nobody who has this hardware has narrowed
+ * it down to individual acceleration primitives yet. This is a Red Hat
+ * workaround for a bug reported in bugzilla at:
+ * https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=74841
+ * Mike A. Harris <[EMAIL PROTECTED]>
+ *
+ * However, it works for some people, so allow them to turn it on
+ * in the config file. Just change the *default*.
+ * Thanks to Dan Christensen <[EMAIL PROTECTED]>
+ */
+ if (cPtr->Chipset == CHIPS_CT69000 && (cPtr->Flags & ChipsAccelSupport) ) {
+ xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
+ "Acceleration is disabled by default on C&T 69000 as it has been
reported\n"
+ "to be broken:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=74841\n";
+ "You can turn it on by adding Option \"NoAccel\" \"false\" to the
Screen\n"
+ "section of your xorg.conf file\n" );
+ }
+
if ((cPtr->Flags & ChipsAccelSupport) &&
- (xf86ReturnOptValBool(cPtr->Options, OPTION_NOACCEL, FALSE))) {
+ (xf86ReturnOptValBool(cPtr->Options, OPTION_NOACCEL,
+ cPtr->Chipset == CHIPS_CT96000))) {
cPtr->Flags &= ~ChipsAccelSupport;
xf86DrvMsg(pScrn->scrnIndex, X_CONFIG, "Acceleration disabled\n");
}
--
Don't say I didn't warn you.
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