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authorHans de Goede <hdegoede@redhat.com>2015-04-17 16:48:07 +0200
committerPeter Hutterer <peter.hutterer@who-t.net>2015-04-21 11:14:57 +1000
commit5defbb5ff664f141293f800c486bc5b723f985ce (patch)
tree41089f2487e3518926bd8625afeb09afe8ae1412 /src
parentf29378b4437e0d50e738641de24ec19d41396284 (diff)
udev: keyboard-builtin: Add support for setting IBM trackpoint sensitivity
IBM / Lenovo trackpoints allow specifying a sensitivity setting through a ps/2 command, which changes the range of the deltas sent when using the trackpoint. On some models with normal usage only deltas of 1 or 2 are send, resulting in there only being 2 mouse cursor movement speeds, rather than the expected fluid scale. Changing the sensitivity to a higher level than the bootup default fixes this. This commit adds support for setting a POINTINGSTICK_SENSITIVITY value in hwdb to allow changing the sensitivity on boot through udev / hwdb.
Diffstat (limited to 'src')
-rw-r--r--src/udev/udev-builtin-keyboard.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/udev/udev-builtin-keyboard.c b/src/udev/udev-builtin-keyboard.c
index c7f7f84afd..b6da734a3c 100644
--- a/src/udev/udev-builtin-keyboard.c
+++ b/src/udev/udev-builtin-keyboard.c
@@ -146,6 +146,32 @@ static void override_abs(int fd, const char *devnode,
log_error_errno(errno, "Unable to EVIOCSABS device \"%s\"", devnode);
}
+static void set_trackpoint_sensitivity(struct udev_device *dev, const char *value)
+{
+ struct udev_device *pdev;
+ char val_s[DECIMAL_STR_MAX(int)];
+ int r, val_i;
+
+ /* The sensitivity sysfs attr belongs to the serio parent device */
+ pdev = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL);
+ if (!pdev) {
+ log_warning("Failed to get serio parent for '%s'", udev_device_get_devnode(dev));
+ return;
+ }
+
+ r = safe_atoi(value, &val_i);
+ if (r < 0) {
+ log_error("Unable to parse POINTINGSTICK_SENSITIVITY '%s' for '%s'", value, udev_device_get_devnode(dev));
+ return;
+ }
+
+ xsprintf(val_s, "%d", val_i);
+
+ r = udev_device_set_sysattr_value(pdev, "sensitivity", val_s);
+ if (r < 0)
+ log_error_errno(r, "Failed to write 'sensitivity' attribute for '%s': %m", udev_device_get_devnode(pdev));
+}
+
static int open_device(const char *devnode) {
int fd;
@@ -223,6 +249,8 @@ static int builtin_keyboard(struct udev_device *dev, int argc, char *argv[], boo
}
override_abs(fd, node, evcode, udev_list_entry_get_value(entry));
+ } else if (streq(key, "POINTINGSTICK_SENSITIVITY")) {
+ set_trackpoint_sensitivity(dev, udev_list_entry_get_value(entry));
}
}