Hi Chris, My fault. Yes the Toshiba Portege M700 and M750's are serial tabletPCs with 1FGT. So good guess. I believe the M750's can have 2FGT also, depending on what was ordered.
I suggested your change. Hopefully he'll want to try it. Dave On Fri, Mar 11, 2011 at 10:30 AM, Chris Bagwell <ch...@cnpbagwell.com> wrote: > On Thu, Mar 10, 2011 at 2:26 PM, Favux ... <favux...@gmail.com> wrote: >> Hi Chris, >> >> BackBONE7 reports the patch didn't work for his stylus issue. Sounds >> more like jumps than jitters. >> >> He sees: >> (WW) Serial Wacom Tablet stylus: bad data at 7 v=91 l=9 >> (WW) Serial Wacom Tablet stylus: bad data at 7 v=91 l=9 >> (WW) Serial Wacom Tablet stylus: bad data at 8 v=91 l=9 >> With both ToolDebugLevel for stylus and TabletDebugLevel. > > In what context are these messages seen? I recall something about > right when stylus is hovering between in and out of proximity? > > The above says it received a packet of length 7 and 8 when it was > expecting a packet of length 9. > > There is some logic in wcmISDV4.c related to packet length size and > its based on status of proximity. That might be get confused by > hovering. > > Length of 7 is valid packet size for pen+touch tablets. Is this one > such device? And the v=91 value also looks touch-ish. > > Also, I'm wondering if wcmSerialValidate should return a value of > "n-1" instead of "n" so that it attempts to restart at what looks like > a new header? If it becomes confused on 1 packet length, it looks > like it may feed on itself and ignore several? I could be misreading > here. > > If the user wants to try it, shouldn't hurt much. Try editing > wcmISDV4.c line #182 and change "return n;" to "return n-1;". > >> >> I don't know if I'm seeing jumps in his debug Xorg.0.logs or not. What >> I do notice is that it'll often hold the same x & y locations for 2 to >> 5 times and then go to the next one. > > One thing I notice during the hangs from snippet you emailed is that > it hangs until this happens a couple of times: > > (II) /dev/ttyS0 (10:wcmReadPacket): buffer has 8 bytes > > Packets of 9 and 7 are OK but not 8. Something is going wrong but > eventually cleans up after itself. The above "n-1" change may allow > it to correct faster and less jumps. > >> Since he updated to >> xf86-input-wacom-0.10.11+ I'm wondering if the filter is holding onto >> old values too long. Maybe the serial tablets don't stream in as much >> data as the usb ones do? So the filtering window or average is wrong >> for them? Or maybe it's just a few serial digitizers like his. A >> sample of what I'm talking about is attached. He supplied a complete >> Xorg.0.log with both ToolDebugLevel for stylus and TabletDebugLevel >> turned up. > > I'm currently guessing its because of discarded data but I could be > totally wrong of course. I think it may take a developer with tablet > to figure this out totally. > > Chris > ------------------------------------------------------------------------------ Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d _______________________________________________ Linuxwacom-devel mailing list Linuxwacom-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxwacom-devel
