I have seen this a couple times, but I haven't been able to catch it when it starts. It's a feedback loop, so once you miss the entrance of the loop, you can't see what really went wrong.
This patch papers over the issue for now. Signed-off-by: Chase Douglas <[email protected]> Acked-by: Daniel Stone <[email protected]> --- No change since v1 src/synaptics.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/src/synaptics.c b/src/synaptics.c index 1d963cb..907f054 100644 --- a/src/synaptics.c +++ b/src/synaptics.c @@ -1975,6 +1975,14 @@ get_delta(SynapticsPrivate *priv, const struct SynapticsHwState *hw, /* report edge speed as synthetic motion. Of course, it would be * cooler to report floats than to buffer, but anyway. */ + + /* FIXME: When these values go NaN, bad things happen. Root cause is unknown + * thus far though. */ + if (isnan(priv->frac_x)) + priv->frac_x = 0; + if (isnan(priv->frac_y)) + priv->frac_y = 0; + tmpf = *dx + x_edge_speed * dtime + priv->frac_x; priv->frac_x = modf(tmpf, &integral); *dx = integral; -- 1.7.8.3 _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: http://lists.x.org/mailman/listinfo/xorg-devel
