On Wed, 16 Jul 2003 20:56:19 +0200, Vojtech Pavlik wrote:
>This is basically because the check for lost bytes wasn't present in
>2.4. Now that it is there, it works well with real lost bytes, but will
>fire also in case when the mouse interrupt was delayed for more than
>half a second, or if indeed a mouse interrupt gets lost. The 2.5 kernel
>by default programs the mouse to high speed reporting (up to 200 updates
>per second). This may, possibly make the problem show up easier.
This was interesting: 2.5 programs the mouse differently than 2.4.
I've been having ps2 mouse problems with the 2.5 input layer,
including having to move the mouse much further for a given
cursor movement, and a general jerky/unstable feeling of the mouse.
2.4's pc_keyb.c has (disabled by default) init code which puts the
mouse in 100 samples/s and 2:1 scaling, whereas 2.5 puts it into
200 samples/s and 1:1 scaling. So I hacked psmouse-base.c to mimic
2.4, and VOILA! now my mouse feels A LOT better.
The crude patch below shows what I did. (I have to set psmouse_noext
as well, to avoid misidentification, jerkiness/lost syncs, and
utter mayhem upon resume from suspend.)
Would you accept a cleaned up patch which allows the rate and
scaling to be adjusted, similarly to noext and resolution?
/Mikael
--- linux-2.6.0-test1/drivers/input/mouse/psmouse-base.c.~1~ 2003-06-23 13:07:37.000000000 +0200
+++ linux-2.6.0-test1/drivers/input/mouse/psmouse-base.c 2003-07-17 01:23:57.000000000 +0200
@@ -33,7 +33,7 @@
#define PSMOUSE_LOGITECH_SMARTSCROLL 1
-static int psmouse_noext;
+static int psmouse_noext = 1;
int psmouse_resolution;
int psmouse_smartscroll = PSMOUSE_LOGITECH_SMARTSCROLL;
@@ -435,7 +435,7 @@
param[0] = 100;
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRATE);
- param[0] = 200;
+ param[0] = 100;
psmouse_command(psmouse, param, PSMOUSE_CMD_SETRATE);
/*
@@ -443,7 +443,8 @@
*/
psmouse_set_resolution(psmouse);
- psmouse_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11);
+#define PSMOUSE_CMD_SETSCALE21 0x00e7
+ psmouse_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE21);
/*
* We set the mouse into streaming mode.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed Jul 23 2003 - 22:00:27 EST