On Sun, Sep 25, 2011 at 08:10:29PM +0200, Julian Andres Klode wrote: > On Sun, Sep 25, 2011 at 11:36:46AM +0300, scoopr wrote: > > I occasionally get this in syslog: > > Sep 25 11:18:24 ac100 kernel: [ 815.981076] nvec nvec.0: RX > > incomplete: Expected 3 bytes, got 2 > > > > and that might manifest as keystroke not going through or, how I > > noticed it, keyup not going through so I get stuck keys.. > Yes, this seems to be a timing issue or whatever. If nvec_interrupt() > runs longer, all 3 bytes are correctly received, at least according > to my short tests yesterday. It also helps slightly to run on > performance governor instead of ondemand. > > I'll investigate this further during the next week and hopefully > find a real solution for this.
I believe that this problem has been fixed in the latest git tree, in the commit indicated below. commit 03d85ef91f0c5a28bfcb660ca4c109ee675b0e4a Author: Julian Andres Klode <[email protected]> Date: Mon Sep 26 14:52:09 2011 +0200 staging: nvec: Add a udelay(100) to nvec_interrupt As the comment indicates, adding that udelay seems to improve the stability of the communication, although it is not known why this is the case. Signed-off-by: Julian Andres Klode <[email protected]> -- Notes: As indicated by the commit message, I have absolutely zero idea why that fixes the problem. It is most likely not the correct solution and only works due to some other reasons. -- Julian Andres Klode - Debian Developer, Ubuntu Member See http://wiki.debian.org/JulianAndresKlode and http://jak-linux.org/.
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