#674 - keycode -> keycode translation harmful (makes configuration complex)

X2Go Bug report logs - #674
keycode -> keycode translation harmful (makes configuration complex)

Reported by: Robert Siemer <Robert.Siemer@backsla.sh>

Date: Fri, 14 Nov 2014 00:50:02 UTC

Severity: normal

Found in version 4.0.1.18

Subject: Bug#674: [X2Go-Dev] Bug#674: Fwd: Bug#674: Acknowledgement (keycode -> keycode translation harmful (makes configuration complex))
Reply-To: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>, 674@bugs.x2go.org
Resent-From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
Resent-To: x2go-dev@lists.x2go.org
Resent-CC: X2Go Developers <x2go-dev@lists.x2go.org>
Resent-Date: Tue, 16 Dec 2014 14:45:02 +0000
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Date: Tue, 16 Dec 2014 14:42:32 +0000
Message-ID: <20141216144232.Horde.p3bJGuiwLTCcXJi7k7d_Dw6@mail.das-netzwerkteam.de>
From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
To: Ulrich Sibiller <uli42@gmx.de>, 674@bugs.x2go.org
References: <54654F43.1020306@backsla.sh>
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 <5483D272.8020008@backsla.sh>
 <CANVnVYK+YXWc_FJqeaEG325AJtGXYSfpD_zx+vbvESOt5WudxA@mail.gmail.com>
 <548B8C0E.7020701@backsla.sh>
 <CANVnVYL1XC9y7bX22Zg4o2Shfw8vbfR-htHSM=wGrMh2Fr78nQ@mail.gmail.com>
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Hi Ulrich, On Di 16 Dez 2014 10:40:06 CET, Ulrich Sibiller wrote: > On Sat, Dec 13, 2014 at 1:45 AM, Robert Siemer > <Robert.Siemer@backsla.sh> wrote: > >> If the translation is on, you get a skewed setup. >> >> Note that the x2go (with the setting of “do nothing”) does a non-perfect >> copy with the same effect: if the translation is effective, the keyboard is >> skewed and you are force to load at least “something” to fix XKB. If the >> translation is off, you “only” need to load XKB configuration if that >> non-perfect copy annoys you... > >> Thanks for the pointer! I had a look at it. As I suspected: the translation >> is “bad”. Sometimes two different keycodes are translated to the same >> keycode. How are you supposed to tell them apart on the remote side? You >> can’t. >> >>> It seems some kind of translation from evdev to pc105 is done. >> >> The naming is a little funny: the keycodes generated by the kernel before >> evdev were not called like that, were they? > > I don't think so. > >>> Do we need to disable setting >>> up the translation within the nx code to make that work? >> >> That would be great as a first step. > > I was wondering why this translations had been introduced. It emerged > between nxagent 3.2.0-10 and 3.3.0-9. The changelog between these > releases contains (among others) these changes: > > nxagent-3.3.0-9 > > - Changed Keyboard initialization and reset. This change should fix > TR11F02129, TR11F02131, TR11F02132. > > nxagent-3.3.0-4 > > - Fix the XKB map load in the case of 64 bit server. > > nxagent-3.3.0-3 > > - Fixed TR10F02119. If the remote X display is using evdev keyboard > then copy maps from remote. > > nxagent-3.2.0-12 > > - Fixed TR08E01814. Added shadow keymap initialization in order to > enable nxcompshad to translate keycodes across different layouts. > > So it MIGHT have been introduced mainly for shadow sessions. The > TR10F02119 refers to Ubuntu 8.10, which - according to some other > posts I found - is the version that introduced evdev. So the fix that > solved evdev problems is causing problems when evdev is enabled. > > I also looked at the source and found that clearing the property seems > to be the only way to disable the translation. (apart from disabling > XKB completely). > > Uli Note that you can view the changes between versions of nxagent via nx-libs.git [1]. Use the "commitdiff" links in the right column... Mike [1] http://code.x2go.org/gitweb?p=nx-libs.git;a=shortlog;h=refs/heads/nxagent -- DAS-NETZWERKTEAM mike gabriel, herweg 7, 24357 fleckeby fon: +49 (1520) 1976 148 GnuPG Key ID 0x25771B31 mail: mike.gabriel@das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.xfb

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X2Go Bug report logs - #674 keycode -> keycode translation harmful (makes configuration complex)

X2Go Bug report logs - #674
keycode -> keycode translation harmful (makes configuration complex)