Created attachment 551 [details]
log out of a thinstation 5.2 session with broken multi-monitor output

Any comments from a ThinLinc developer on this issue? As we are a paid customer I would expect some faster replies on that matter. We really need to debug that situation since we want to move to Thinstation 5.2 use soon.

Comment 4 Henrik Andersson 2014-06-12 13:17:41 CEST

(In reply to comment #3)
> Any comments from a ThinLinc developer on this issue? As we are a paid customer
> I would expect some faster replies on that matter. We really need to debug that
> situation since we want to move to Thinstation 5.2 use soon.

The bug has our attention and you will get updates on this bug of our progress looking into this issue.

Comment 5 Henrik Andersson 2014-06-12 13:37:50 CEST

Could you provide the configuration file for your TS5.2 image(In reply to comment #0)
> Currently I am still not sure which side to blame (ThinLinc or ThinStation) so
> I would like to receive some advice of performing some additional debugging to
> actually identify the root of the problem.

Which window manager did you select to use in you TS5.2 configuration ?

Could you provide your build.conf / thinstation.conf.buildtime for the TS5.2 ?

The window manager used is openbox and its configuration file can be viewed from:

https://github.com/hzdr/thinstation/blob/master/ts/5.2/packages/hzdr/etc/xdg/openbox/rc-single-app.xml

The build.conf and thinstation.conf.buildtime can be also downloaded from

https://github.com/hzdr/thinstation/tree/master/ts/5.2/conf/hzdr

Comment 7 Henrik Andersson 2014-06-13 09:56:03 CEST

The issue is reproducible on Ubuntu 14.04 - Xorg 7.7, opebox 3.5.2

Perfect. Any suggested workaround?

Comment 9 Henrik Andersson 2014-06-13 10:12:17 CEST

openbox seems to not support multihead;

prop -root | grep _NET_WM_FULLSCREEN_MONITORS

Could it be that xfwm is used as default WM in Thinstation 5.1 ?

Yes, xfwm is the default.

However, we currently use openbox 3.5.0 within thinstation 5.1 and perform correct multi-headed connections via ThinLinc and the openbox version there also doesn't reply to _NET_WM_FULLSCREEN_MONITORS property requests. In fact, in thinstation 5.2 also openbox 3.5.0 is still used.

Comment 11 Henrik Andersson 2014-06-13 10:40:40 CEST

Could you provide output for xprop -root for both 5.1 and 5.2 ?

Sure.

Here for Thinstation 5.2+OpenBox (non-working multi-head):

-- cut here --
_NET_ACTIVE_WINDOW(WINDOW): window id # 0xa0000e
_NET_CLIENT_LIST(WINDOW): window id # 0xa0000e
_NET_SHOWING_DESKTOP(CARDINAL) = 0
_NET_CURRENT_DESKTOP(CARDINAL) = 0
_NET_DESKTOP_NAMES(UTF8_STRING) = "qutselect"
_NET_WORKAREA(CARDINAL) = 0, 0, 1920, 1200
_NET_DESKTOP_VIEWPORT(CARDINAL) = 0, 0
_NET_NUMBER_OF_DESKTOPS(CARDINAL) = 1
_NET_DESKTOP_GEOMETRY(CARDINAL) = 1920, 1200
_NET_CLIENT_LIST_STACKING(WINDOW): window id # 0xa0000e
_OB_THEME(UTF8_STRING) = "Clearlooks"
_OB_CONFIG_FILE(UTF8_STRING) = "/etc/xdg/openbox/rc-single-app.xml"
_OB_VERSION(UTF8_STRING) = "3.5.0"
_NET_SUPPORTED(ATOM) = _NET_SUPPORTING_WM_CHECK, _NET_WM_FULL_PLACEMENT, _NET_CURRENT_DESKTOP, _NET_NUMBER_OF_DESKTOPS, _NET_DESKTOP_GEOMETRY, _NET_DESKTOP_VIEWPORT, _NET_ACTIVE_WINDOW, _NET_WORKAREA, _NET_CLIENT_LIST, _NET_CLIENT_LIST_STACKING, _NET_DESKTOP_NAMES, _NET_CLOSE_WINDOW, _NET_DESKTOP_LAYOUT, _NET_SHOWING_DESKTOP, _NET_WM_NAME, _NET_WM_VISIBLE_NAME, _NET_WM_ICON_NAME, _NET_WM_VISIBLE_ICON_NAME, _NET_WM_DESKTOP, _NET_WM_STRUT, _NET_WM_STRUT_PARTIAL, _NET_WM_ICON, _NET_WM_ICON_GEOMETRY, _NET_WM_WINDOW_TYPE, _NET_WM_WINDOW_TYPE_DESKTOP, _NET_WM_WINDOW_TYPE_DOCK, _NET_WM_WINDOW_TYPE_TOOLBAR, _NET_WM_WINDOW_TYPE_MENU, _NET_WM_WINDOW_TYPE_UTILITY, _NET_WM_WINDOW_TYPE_SPLASH, _NET_WM_WINDOW_TYPE_DIALOG, _NET_WM_WINDOW_TYPE_NORMAL, _NET_WM_ALLOWED_ACTIONS, _NET_WM_ACTION_MOVE, _NET_WM_ACTION_RESIZE, _NET_WM_ACTION_MINIMIZE, _NET_WM_ACTION_SHADE, _NET_WM_ACTION_MAXIMIZE_HORZ, _NET_WM_ACTION_MAXIMIZE_VERT, _NET_WM_ACTION_FULLSCREEN, _NET_WM_ACTION_CHANGE_DESKTOP, _NET_WM_ACTION_CLOSE, _NET_WM_ACTION_ABOVE, _NET_WM_ACTION_BELOW, _NET_WM_STATE, _NET_WM_STATE_MODAL, _NET_WM_STATE_MAXIMIZED_VERT, _NET_WM_STATE_MAXIMIZED_HORZ, _NET_WM_STATE_SHADED, _NET_WM_STATE_SKIP_TASKBAR, _NET_WM_STATE_SKIP_PAGER, _NET_WM_STATE_HIDDEN, _NET_WM_STATE_FULLSCREEN, _NET_WM_STATE_ABOVE, _NET_WM_STATE_BELOW, _NET_WM_STATE_DEMANDS_ATTENTION, _NET_MOVERESIZE_WINDOW, _NET_WM_MOVERESIZE, _NET_WM_USER_TIME, _NET_FRAME_EXTENTS, _NET_REQUEST_FRAME_EXTENTS, _NET_RESTACK_WINDOW, _NET_STARTUP_ID, _NET_WM_SYNC_REQUEST, _NET_WM_SYNC_REQUEST_COUNTER, _NET_WM_PID, _NET_WM_PING, _KDE_WM_CHANGE_STATE, _KDE_NET_WM_FRAME_STRUT, _KDE_NET_WM_WINDOW_TYPE_OVERRIDE, _OB_WM_ACTION_UNDECORATE, _OB_WM_STATE_UNDECORATED, _OPENBOX_PID, _OB_THEME, _OB_CONFIG_FILE, _OB_CONTROL, _OB_VERSION, _OB_APP_ROLE, _OB_APP_TITLE, _OB_APP_NAME, _OB_APP_CLASS, _OB_APP_TYPE
_NET_SUPPORTING_WM_CHECK(WINDOW): window id # 0x800123
_OPENBOX_PID(CARDINAL) = 3438
_XKB_RULES_NAMES(STRING) = "evdev", "pc104", "de,us", "", "grp:sclk_toggle,grp_led:scroll"
XFree86_VT(INTEGER) = 5
-- cut here --

And here for thinstation 5.1+openbox (working multi-head):

-- cut here --
_NET_ACTIVE_WINDOW(WINDOW): window id # 0xa0000e
_NET_CLIENT_LIST(WINDOW): window id # 0xa0000e
_NET_SHOWING_DESKTOP(CARDINAL) = 0
_NET_CURRENT_DESKTOP(CARDINAL) = 0
_NET_DESKTOP_NAMES(UTF8_STRING) = "qutselect"
_NET_WORKAREA(CARDINAL) = 0, 0, 1920, 1200
_NET_DESKTOP_VIEWPORT(CARDINAL) = 0, 0
_NET_NUMBER_OF_DESKTOPS(CARDINAL) = 1
_NET_DESKTOP_GEOMETRY(CARDINAL) = 1920, 1200
_NET_CLIENT_LIST_STACKING(WINDOW): window id # 0xa0000e
_OB_THEME(UTF8_STRING) = "Clearlooks"
_OB_CONFIG_FILE(UTF8_STRING) = "/etc/xdg/openbox/rc-single-app.xml"
_OB_VERSION(UTF8_STRING) = "3.5.0"
_NET_SUPPORTED(ATOM) = _NET_SUPPORTING_WM_CHECK, _NET_WM_FULL_PLACEMENT, _NET_CURRENT_DESKTOP, _NET_NUMBER_OF_DESKTOPS, _NET_DESKTOP_GEOMETRY, _NET_DESKTOP_VIEWPORT, _NET_ACTIVE_WINDOW, _NET_WORKAREA, _NET_CLIENT_LIST, _NET_CLIENT_LIST_STACKING, _NET_DESKTOP_NAMES, _NET_CLOSE_WINDOW, _NET_DESKTOP_LAYOUT, _NET_SHOWING_DESKTOP, _NET_WM_NAME, _NET_WM_VISIBLE_NAME, _NET_WM_ICON_NAME, _NET_WM_VISIBLE_ICON_NAME, _NET_WM_DESKTOP, _NET_WM_STRUT, _NET_WM_STRUT_PARTIAL, _NET_WM_ICON, _NET_WM_ICON_GEOMETRY, _NET_WM_WINDOW_TYPE, _NET_WM_WINDOW_TYPE_DESKTOP, _NET_WM_WINDOW_TYPE_DOCK, _NET_WM_WINDOW_TYPE_TOOLBAR, _NET_WM_WINDOW_TYPE_MENU, _NET_WM_WINDOW_TYPE_UTILITY, _NET_WM_WINDOW_TYPE_SPLASH, _NET_WM_WINDOW_TYPE_DIALOG, _NET_WM_WINDOW_TYPE_NORMAL, _NET_WM_ALLOWED_ACTIONS, _NET_WM_WINDOW_OPACITY, _NET_WM_ACTION_MOVE, _NET_WM_ACTION_RESIZE, _NET_WM_ACTION_MINIMIZE, _NET_WM_ACTION_SHADE, _NET_WM_ACTION_MAXIMIZE_HORZ, _NET_WM_ACTION_MAXIMIZE_VERT, _NET_WM_ACTION_FULLSCREEN, _NET_WM_ACTION_CHANGE_DESKTOP, _NET_WM_ACTION_CLOSE, _NET_WM_ACTION_ABOVE, _NET_WM_ACTION_BELOW, _NET_WM_STATE, _NET_WM_STATE_MODAL, _NET_WM_STATE_MAXIMIZED_VERT, _NET_WM_STATE_MAXIMIZED_HORZ, _NET_WM_STATE_SHADED, _NET_WM_STATE_SKIP_TASKBAR, _NET_WM_STATE_SKIP_PAGER, _NET_WM_STATE_HIDDEN, _NET_WM_STATE_FULLSCREEN, _NET_WM_STATE_ABOVE, _NET_WM_STATE_BELOW, _NET_WM_STATE_DEMANDS_ATTENTION, _NET_MOVERESIZE_WINDOW, _NET_WM_MOVERESIZE, _NET_WM_USER_TIME, _NET_FRAME_EXTENTS, _NET_REQUEST_FRAME_EXTENTS, _NET_RESTACK_WINDOW, _NET_STARTUP_ID, _NET_WM_SYNC_REQUEST, _NET_WM_SYNC_REQUEST_COUNTER, _NET_WM_PID, _NET_WM_PING, _KDE_WM_CHANGE_STATE, _KDE_NET_WM_FRAME_STRUT, _KDE_NET_WM_WINDOW_TYPE_OVERRIDE, _OB_WM_ACTION_UNDECORATE, _OB_WM_STATE_UNDECORATED, _OPENBOX_PID, _OB_THEME, _OB_CONFIG_FILE, _OB_CONTROL, _OB_VERSION, _OB_APP_ROLE, _OB_APP_TITLE, _OB_APP_NAME, _OB_APP_CLASS, _OB_APP_TYPE
_NET_SUPPORTING_WM_CHECK(WINDOW): window id # 0x800123
_OPENBOX_PID(CARDINAL) = 3245
_XKB_RULES_NAMES(STRING) = "evdev", "evdev", "de,us", "", "grp:sclk_toggle,grp_led:scroll"
XFree86_VT(INTEGER) = 5
-- cut here --

Comment 13 Henrik Andersson 2014-06-16 09:33:27 CEST

From ThinLinc client point of view, multi-monitor is only fully supported if the window manager supports EWMH and the properties; _NET_WM_ACTION_FULLSCREEN, _NET_WM_STATE_FULLSCREEN and _NET_WM_FULLSCREEN_MONITORS. This is not the case for OpenBox.

There is a corner case which I believe you see in ThinStation 5.1; if the window manager is not supporting EWMH, fltk will do an override redirect to handle multi head as good as we can. However this fallback is preventing other parts to function correctly in ThinLinc client, such as disable send of system keys etc.

Your options are to switch WM to one which has support for the above requirements, such as xfwm4 or you could try to drill down why OpenBox announce support for EWMH in TS5.2 and not in TS5.1 (probably due to some compilation flag or dependency while built).

Comment 14 Pierre Ossman 2014-06-17 11:09:59 CEST

We'll report a bug with upstream that they need to add this functionality, then we'll close this bug here.

Ok, perfect. In the meantime I replaced openbox with a minimal setup of xfwm4 and now thinlinc works fine within a multi-monitor setup. So reporting this upstream should be really a good idea so that the openbox people can implement these extensions.

It however would also be probably a good idea to add a "Window Manager Compatibility" section to the ThinLinc administration documentation or somewhere only where you can report und which window managers the thinlinc client works best.

Comment 16 Peter Åstrand 2014-07-07 13:58:17 CEST

Added upstream bug:

https://bugzilla.icculus.org/show_bug.cgi?id=6246