On Thu, Sep 04, 2014 at 02:54:23PM -0700, Greg KH wrote: > On Thu, Sep 04, 2014 at 02:30:40PM -0700, Sarah Sharp wrote: > > On Sat, Aug 16, 2014 at 12:37:19AM -0700, Eric Decker wrote: > > > Hi Sarah, > > > > > > I talked to you a while back about the ELAN touchscreen in my ASUS laptop > > > doing a repeated disconnect. > > > > > > It just came back. So you are probably right about it being flakey h/w. > > > > > > Returning it at this point probably isn't an option. > > > > > > Now if the ELAN touchscreen is a problem, is there a way to blacklist it so > > > it doesn't get turned on? > > > > > > I don't even use the touchscreen. > > > > You could blacklist the driver, e.g. put the module name in > > /etc/modprobe.d/blacklist-whatever.conf > > > > That will at least stop the module from being loaded, but won't stop it > > from being enumerated. I think there's a way for userspace to claim a > > particular port so that the kernel doesn't even do enumeration, but I > > can't remember the interface. Maybe Mathias or Alan knows? > > You might want to look at Johan's patches on the list, they address a > known problem with ELAN touchscreens of being "flakey" that solves the > issue with my laptop, and should be merged soon. The problem is the > hardware goes crazy if it doesn't see USB traffic very quickly after > booting, and constantly. So switching to console mode, or booting to > console mode can cause problems. I'd be interested to see if those > patches solve your issue as well. Eric, the new always-poll quirk can be found here if you want to give it a try: http://marc.info/?l=linux-usb&m=140993344211315&w=2 My Elan touchscreen also needs the following quirk to enumerate reliably: http://marc.info/?l=linux-usb&m=140898201107571&w=2 Johan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
