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From: Anders Bruun Olsen <abo <at> dsl.dk>
Subject: Re: Bug#112: Mac Os X keyboard bug: NumLockMask always set, keyboard unusable
Newsgroups: gmane.linux.terminal-server.x2go.devel
Date: Monday 4th February 2013 10:29:10 UTC (over 3 years ago)
We had a similar problem on our setup (Ubuntu 10.04 with standard Gnome 2
desktop). We fixed it by removing the content of the affected user's gconf:
/desktop/gnome/peripherals/keyboard/kbd. You can do this by either using
gconf-editor or deleting .gconf/desktop/gnome/peripherals/keyboard/kbd.
After that, everything works fine.

2013/2/2 Ricardo Díaz Martín 

> Hi Benjamin,
> I can confirm the same keyboard behaviour.
> I found a solution for this issue by myself. Install kde desktop in the
> server and start kde session with a clean home folder for the user and
> keyborad works! It only works with kde desktop.
> If you have logged on before with a user in gnome desktop you have to
> rename user's home folder, login this wat in kde and then move files and
> folder your really need.
> Hope it helps you.
> Regards,
> Ricardo
> 2013/1/30 benjamin milde 
>> Package: *
>> Version: various versions tried out, see below
>> * Buggy package name not known. I suspect a problem with nx-libraries.
>> I can supply further information for the mac os x keyboard bug in x2go.
>> think I had this problem already ~2 years ago, when I first tried out
>> All pressed client keys produce wrong key events on the host. Its a real
>> show-stopper since it makes x2go basically totally unusable for me and
>> others.
>> See also this post on the x2go mailing list
>> https://lists.berlios.de/pipermail/x2go-user/2012-November/001123.html
>> There, Michael had the same problem I observe with:
>> Server Side: Ubuntu 12.04 with x2goserver from
>> stable PPA
>> Client Side: Mac OS X 10.6.8 with x2goclient from the x2go
>> website
>> Keyboard Layout: en_us everywhere, and in x2goclient I checked "Keep
>> current keyboard Settings"
>> I'm using Mac OS X 10.8.2, XQuarz 2.7.4 and also x2goclient I
>> also tried changing x2goserver from stable PPA to 4.1.0 from git. Also
>> toggling "Keep current keyboard Settings" does not make a difference.
>> Server is also a ubuntu machine, but could cross-check this with a
>> install (and see if the same error occurs there).
>> The problem is that keystate changes while it is transferred to the
>> MAC:   state 0x0, keycode 26 (keysym 0x31, 1), same_screen YES,
>> LINUX: state 0x10, keycode 26 (keysym 0x65, e), same_screen YES,
>> This makes the keyboard unusable, since every client keycode gives a
>> wrong keysym on the host. The mask 0x10 is set for all key events sent
>> the host, every time.
>> Looking around in X's headers I found:
>> defined in 
>> /* Key masks. Used as modifiers to GrabButton and GrabKey, results of
>> QueryPointer,
>>    state in various key-, mouse-, and button-related events. */
>> #define ShiftMask               (1<<0)
>> #define LockMask                (1<<1)
>> #define ControlMask             (1<<2)
>> #define Mod1Mask                (1<<3)
>> #define Mod2Mask                (1<<4)
>> #define Mod3Mask                (1<<5)
>> #define Mod4Mask                (1<<6)
>> #define Mod5Mask                (1<<7)
>> So keystate 0x10 means the keyevent has Mod2Mask set.
>> defined in  (but don't think it's a standard X11
>> header)
>> #define AltMask         Mod1Mask
>> #define NumLockMask     Mod2Mask
>> #define AltLangMask     Mod3Mask
>> #define KanaMask        Mod4Mask
>> #define ScrollLockMask  Mod5Mask
>> Which appears to be a NumLockMask. This makes sense since 'dfg' gives
>> numbers '124', i.e. indicating that I have some sort of Numpad overlay
>> the middle of the keyboard on the host.
>> For what is worth, a found similar bug report with no machines remote
>> desktop.
>> http://apple.stackexchange.com/questions/31691/no-machine-remote-desktop-issue
>>  "For instance, the Delete key was now comma, all the letters were
>> transposed, general chaos. "
>> I can also confirm that backspace is comma, so this seems to be the same
>> NumLockMask problem. Every key is garbled, but not randomly.
>> The same problems apparently appears here in a bug report in XQuartz.
>> They think its not their fault:
>> http://xquartz.macosforge.org/trac/ticket/471
>> Quote:
>> "From my experience using NX in Linux, NX is badly designed. It sends
>> keycodes instead of KeySyms to the remote NX session.
>>  This causes the remote session to behave badly, unless you install the
>> local keyboard map into the remote X session.
>> It is a problem with NX and not the X server. However, that should have
>> no effect on the local keyboard mapping. "
>> If someone could point me in the right direction, I would be glad to
>> help.
>> And as I have no need for the Mod2Mask, as a temporary fix, I would be
>> fine to ignore this mask on the server side and hard code xkey->state &=
>> ~(1u << 4); somewhere.
>> Has someone an idea how to further investigate this issue? Is there
>> someone who can report a working keyboard with Mac Os X as client?
>> _______________________________________________
>> X2Go-Dev mailing list
>> [email protected]
>> https://lists.berlios.de/mailman/listinfo/x2go-dev
> _______________________________________________
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Anders Bruun Olsen
Det Danske Sprog- og Litteraturselskab
(Society for Danish Language and Literature)
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