I have been looking into this problem, especially Dmitry Torokhov's work around this issue. It appears that there is a patch that has been implemented in Gentoo for the 2.6.32 kernel series. Since this patch is dated 2010-07-29, I am wondering if this patch has been incorporated into the mainline kernel builds. Please confirm. If it has not, I plan to build a kernel that incorporates this patch.
Patch is as follows
--- a/drivers/input/mouse/synaptics.c 2010-07-29 09:14:58.000000000 -0400
+++ b/drivers/input/mouse/synaptics.c 2010-07-29 09:16:34.000000000 -0400
@@ -136,8 +136,14 @@ static int synaptics_capability(struct p
return -1;
priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
priv->ext_cap = 0;
- if (!SYN_CAP_VALID(priv->capabilities))
+
+ /*
+ * Older firmwares had submodel ID fixed to 0x47
+ */
+ if (SYN_ID_FULL(priv->identity) < 0x705 &&
+ SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
return -1;
+ }
I have been looking into this problem, especially Dmitry Torokhov's work around this issue. It appears that there is a patch that has been implemented in Gentoo for the 2.6.32 kernel series. Since this patch is dated 2010-07-29, I am wondering if this patch has been incorporated into the mainline kernel builds. Please confirm. If it has not, I plan to build a kernel that incorporates this patch.
Patch is as follows
--- a/drivers/ input/mouse/ synaptics. c 2010-07-29 09:14:58.000000000 -0400 input/mouse/ synaptics. c 2010-07-29 09:16:34.000000000 -0400 capability( struct p >capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2]; VALID(priv- >capabilities) ) FULL(priv- >identity) < 0x705 && SUBMODEL_ ID(priv- >capabilities) != 0x47) {
+++ b/drivers/
@@ -136,8 +136,14 @@ static int synaptics_
return -1;
priv-
priv->ext_cap = 0;
- if (!SYN_CAP_
+
+ /*
+ * Older firmwares had submodel ID fixed to 0x47
+ */
+ if (SYN_ID_
+ SYN_CAP_
return -1;
+ }
/* input/mouse/ synaptics. h 2010-07-29 09:15:00.000000000 -0400 input/mouse/ synaptics. h 2010-07-29 09:17:10.000000000 -0400 FOUR_BUTTON( c) ((c) & (1 << 3)) MULTIFINGER( c) ((c) & (1 << 1)) PALMDETECT( c) ((c) & (1 << 0)) SUBMODEL_ ID(c) (((c) & 0x00ff00) >> 8) CAP_REQUESTS( c) (((c) & 0x700000) >> 20) MULTI_BUTTON_ NO(ec) (((ec) & 0x00f000) >> 12)
* Unless capExtended is set the rest of the flags should be ignored
--- a/drivers/
+++ b/drivers/
@@ -45,7 +45,7 @@
#define SYN_CAP_
#define SYN_CAP_
#define SYN_CAP_
-#define SYN_CAP_VALID(c) ((((c) & 0x00ff00) >> 8) == 0x47)
+#define SYN_CAP_
#define SYN_EXT_
#define SYN_CAP_
@@ -61,6 +61,7 @@ IS_SYNAPTICS( i) ((((i) >> 8) & 0xff) == 0x47)
#define SYN_ID_MODEL(i) (((i) >> 4) & 0x0f)
#define SYN_ID_MAJOR(i) ((i) & 0x0f)
#define SYN_ID_MINOR(i) (((i) >> 16) & 0xff)
+#define SYN_ID_FULL(i) ((SYN_ID_MAJOR(i) << 8) | SYN_ID_MINOR(i))
#define SYN_ID_
/* synaptics special commands */