Hi, On 07/09/2014 09:38 PM, Dmitry Torokhov wrote: > On Wed, Jul 09, 2014 at 07:48:21PM +0200, Vojtech Pavlik wrote: >> On Wed, Jul 09, 2014 at 09:54:38AM -0700, Dmitry Torokhov wrote: >>> On Wed, Jun 25, 2014 at 11:42:43AM +0200, Jiri Kosina wrote: >>>> Acer Aspire needs to be added to nomux blacklist, otherwise the touchpad >>>> misbehaves rather randomly. >>>> >>>> Signed-off-by: Jiri Kosina <jkosina@xxxxxxx> >>>> >>>> --- >>>> >>>> Hi Dmitry, >>>> >>>> I've come across this a few year old patch originating from our internal >>>> bugzilla, which was apparently been lost between the cracks somewhere. >>>> We've been carrying it in our kernel tree for quite some time ... could >>>> you please apply it? Thanks. >>> >>> I will. I also wonder if by now we should stop defaulting to MUX mode: >>> all newer desktop/server boxes use USB, only laptops still use PS/2, >> >> MUX mode was only ever available on laptops - no desktop computer I'm >> aware of ever had it. > > Yeah, I don't recall seeing one either. > >> >>> and quite a few of them not implement active MUX properly. >> >> Do you still get reports of non-working, but advertized Active >> Multiplexing mode on new laptops? > > Evey now and then... Vendors seem to not normally touch that code. > >> >>> I also expect >>> that most of external PS/2 mice are dead by now, so number of cases when >> >> One would at least hope so. Sadly, internal mice and PS/2 keyboards >> aren't going to go away any soon, due to larger power consumption of USB >> devices. > > Right, but we are not talking about mouse vs keyboard, they use separate > ports anyway, it is touchpad plus external PS/2 mouse case where active > MUX might help. What about laptops with both a touchpad and a trackpoint ? I think in most cases the trackpoint works through some sort of pass-through mode of the touchpad (or is outright part of the touchpad ps/2 device), but are we sure there are no cases where the trackpoint and touchpad are really separate ps/2 devices hookedup through an active mux ? > >> >>> we have users with PS/2 touchpad + external PS/2 mouse + working active >>> MUX is exceedingly small. >>> >>> Let's pull Vojtech in ;) >> >> What I'd prefer is to, based on DMI data, report but not enable by >> default Active MUX mode on any machine manufactured after a certain >> date. Plus have a DMI-based whitelist for machines that absolutely >> needed, if any are found later. > > Looking at the changes to nomux blacklist sometimes even trying MUX > messes up KBC. Instead of playing date games I'd rather simply make > i8042.nomux default. I'm fine with having whitelist for boxes that > actually need and support muxing properly. I'm a bit skeptical about making this change, see above. Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
