Re: [Fontforge-devel] Crash when selecting a glyph "X Error of failed request: BadDevice, invalid or uninitialized input device"

[Shaheed <sr...@th...>]

HI,

I think the problem is related to the "tablet" part of my Tecra M4 Tablet PC. 
Here is a stack trace with sources from sourceforge today 
(fontforge-20060413):

(gdb) bt
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb7a85e91 in raise () from /lib/tls/libc.so.6
#2  0xb7f4c9f2 in myerrorhandler (disp=0x84c1620, err=0xb7b8aff4) at 
gxdraw.c:776
#3  0xb7bf386f in _XError () from /usr/X11R6/lib/libX11.so.6
#4  0xb7bf3f5f in _XReply () from /usr/X11R6/lib/libX11.so.6
#5  0xb7c9b7d4 in XOpenDevice () from /usr/X11R6/lib/libXi.so.6
#6  0xb7f51db2 in GXDrawRequestDeviceEvents (w=0x8873748, devcnt=2, 
de=0x8308ec0) at gxdraw.c:3390
#7  0xb7f078bd in GDrawRequestDeviceEvents (w=0x6, devcnt=2, de=0x8308ec0) at 
gdraw.c:678
#8  0x080881fb in _CharViewCreate (cv=0x886e270, sc=0x85ca3a0, fv=0x8687a18, 
enc=0)
    at charview.c:7688
#9  0x08089771 in CharViewCreate (sc=0x85ca3a0, fv=0x8687a18, enc=268) at 
charview.c:7828
#10 0x080e2672 in FVMouse (fv=0x8687a18, event=0xbfe7d58c) at fontview.c:9678
#11 0x080e7858 in v_e_h (gw=0x868eba8, event=0xbfe7d58c) at fontview.c:9956
#12 0xb7f0441d in _GWidget_Container_eh (gw=0x868eba8, event=0xbfe7d58c) at 
gcontainer.c:385
#13 0xb7f5232a in dispatchEvent (gdisp=0x84c9968, event=0xbfe7d60c) at 
gxdraw.c:3128
#14 0xb7f5388b in GXDrawEventLoop (gd=0x84c9968) at gxdraw.c:3227
#15 0xb7f07644 in GDrawEventLoop (gdisp=0x0) at gdraw.c:626
#16 0x081856c1 in FontForgeMain (argc=2, argv=0xbfe7e0c4) at start.c:786
#17 0xb7a72e40 in __libc_start_main () from /lib/tls/libc.so.6
#18 0x0805d901 in _start () at ../sysdeps/i386/elf/start.S:119
(gdb)                                                               

The calls to XOpenDevice are iterating the known input devices, using loop 
counter "i":

(gdb) p i
$15 = 4
(gdb) p gdisp.inputdevices[0]
$16 = {name = 0x8873a10 "SynapticsMouse1", devid = 0, dev = 0x0, event_types = 
{0, 0, 0, 0, 0}}
(gdb) p gdisp.inputdevices[1]
$17 = {name = 0x8873a28 "Mouse1", devid = 1, dev = 0x0, event_types = {0, 0, 
0, 0, 0}}
(gdb) p gdisp.inputdevices[2]
$18 = {name = 0x8873a38 "Keyboard1", devid = 5, dev = 0x0, event_types = {0, 
0, 0, 0, 0}}
(gdb) p gdisp.inputdevices[3]
$19 = {name = 0x8873a48 "cursor", devid = 4, dev = 0x0, event_types = {0, 0, 
0, 0, 0}}
(gdb) p gdisp.inputdevices[4]
$20 = {name = 0x8873a58 "stylus", devid = 3, dev = 0x0, event_types = {0, 0, 
0, 0, 0}}
(gdb) p gdisp.inputdevices[5]
$21 = {name = 0x8873a68 "eraser", devid = 2, dev = 0x0, event_types = {0, 0, 
0, 0, 0}}
(gdb) p gdisp.inputdevices[6]
$22 = {name = 0x0, devid = 0, dev = 0x0, event_types = {0, 0, 0, 0, 0}}

After I disabled the tablet-related items from my xorg.conf, all is well 
again. I don't know X in enough detail to know why this might have happened, 
but I attach my xorg.conf (with the relevant lines commented out). I hope 
this helps debug the problem.

Thanks, Shaheed