On Tue, Oct 21, 2014 at 2:26 AM, Hans de Goede <hdegoede@xxxxxxxxxx> wrote: > Hi, > > On 10/20/2014 09:48 PM, Benjamin Tissoires wrote: >> On Mon, Oct 20, 2014 at 1:56 PM, Hans de Goede <hdegoede@xxxxxxxxxx> wrote: >>> Hi, >>> >>> On 10/20/2014 05:38 PM, Benjamin Tissoires wrote: >>>> Hi Carla, >>>> >>>> just FYI, I have the same laptop model than you, and can reproduce >>>> your bug report in the same way. I'll work on that to make it working >>>> properly. >>>> >>>> Hans, (unfortunately,) this laptop has a ETD0105 touchpad from Elan. >>>> That means that we do not have the X550 touchpad in house, but also >>>> means that we should be able to get in working faster than the X550 >>>> one :) >>> >>> Ok, so 2 things: >>> >>> 1) On the ETD0105 touchpad not working, does the kernel you're using >>> already have this patch ? : >>> >>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/input/mouse/elantech.c?id=271329b3c798b2102120f5df829071c211ef00ed >> >> I tried the RHEL 6.6 kernel (the only I had on a usb disk handy at that time). >> The Fedora 21 snapshot (3.17.0) makes it detected properly :) > > Good. > >> However, landing 8 fingers on the touchpad makes it completely lost >> (waiting few seconds without touching it is enough to get it back >> alive). > > Hmm, might be a firmware bug, but this also might mean it can detect > more fingers then previous versions, and sends a new packet type when > more then X fingers are present, we should probably end a mail to > our contacts at elantech about this. Since you've the hardware I > assume you will be sending such a mail ? > I tried to dump the PS2 events, and checked if a new packet was coming, and it appears that nothing indicates that the device is capable of tracking more than 5 fingers. Sometimes, the first time I land 8 fingers on the touchpad after a hard reboot, the device receives a lost sync events, and has to reconnect, but then, these lost sync events do not occurs anymore. I would be tempted to say that this is a firmware bug and that we can not do much for it, but I'll ask Elantech about it. Cheers, Benjamin -- 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
