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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-12-12 09:05:53 +0100 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-12-12 09:06:56 +0100 |
| commit | 8521478f67e95ada4e87970c7b41e504c724b2cf (patch) | |
| tree | 4062db2eb34382a242116a575396b31dca679103 | |
| parent | Input: cma3000_d0x - fix signedness bug in cma3000_thread_irq() (diff) | |
| download | linux-8521478f67e95ada4e87970c7b41e504c724b2cf.tar.xz linux-8521478f67e95ada4e87970c7b41e504c724b2cf.zip | |
Input: synaptics - fix touchpad not working after S2R on Vostro V13
Synaptics touchpads on several Dell laptops, particularly Vostro V13
systems, may not respond properly to PS/2 commands and queries immediately
after resuming from suspend to RAM. This leads to unresponsive touchpad
after suspend/resume cycle.
Adding a 1-second delay after resetting the device allows touchpad to
finish initializing (calibrating?) and start reacting properly.
Reported-by: Daniel Manrique <daniel.manrique@canonical.com>
Tested-by: Daniel Manrique <daniel.manrique@canonical.com>
Cc: stable@kernel.org
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
| -rw-r--r-- | drivers/input/mouse/synaptics.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index c080b828e5dc..a6dcd18e9adf 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -24,6 +24,7 @@ */ #include <linux/module.h> +#include <linux/delay.h> #include <linux/dmi.h> #include <linux/input/mt.h> #include <linux/serio.h> @@ -1220,6 +1221,16 @@ static int synaptics_reconnect(struct psmouse *psmouse) do { psmouse_reset(psmouse); + if (retry) { + /* + * On some boxes, right after resuming, the touchpad + * needs some time to finish initializing (I assume + * it needs time to calibrate) and start responding + * to Synaptics-specific queries, so let's wait a + * bit. + */ + ssleep(1); + } error = synaptics_detect(psmouse, 0); } while (error && ++retry < 3); |