Bug #94737 “[apport] gdmgreeter crashed with SIGSEGV in _XkbRead...” : Bugs : xorg-server package : Ubuntu

Revision history for this message

Christophe Mehay (goldy-goldenfish) wrote on 2007-03-22:

#1

CoreDump.gz Edit (1019.5 KiB, application/x-gzip)
Dependencies.txt Edit (8.9 KiB, text/plain; charset="utf-8")
Disassembly.txt Edit (1.1 KiB, text/plain; charset="utf-8")
ProcMaps.txt Edit (18.4 KiB, text/plain; charset="utf-8")
ProcStatus.txt Edit (611 bytes, text/plain; charset="utf-8")
Registers.txt Edit (519 bytes, text/plain; charset="utf-8")
Stacktrace.txt Edit (212 bytes, text/plain; charset="utf-8")
ThreadStacktrace.txt Edit (239 bytes, text/plain; charset="utf-8")

Revision history for this message

Daniel Holbach (dholbach) wrote on 2007-03-22:

#2

Thanks for your bug report.

Changed in gdm:
assignee:	nobody → desktop-bugs
importance:	Undecided → Medium

Revision history for this message

In freedesktop.org Bugzilla #10383, Sebastien Bacher (seb128) wrote on 2007-03-23:

#3

Download full text (4.7 KiB)

The bug has been opened on https://launchpad.net/bugs/94737

"Binary package hint: gdm

crash when I used xdmcp server
...
libx11-6 2:1.1.1-1ubuntu1
...
http://librarian.launchpad.net/6898243/ThreadStacktrace.txt
ThreadStacktrace.txt
..."

Debug backtrace for the crash:

206 map->syms[offset]= 0;
(gdb) thread apply all bt full

Thread 1 (process 5372):
#0 0xb76df41b in _XkbReadGetMapReply (dpy=0x8086108, rep=0xbf8e97a4, xkb=0x8557fc0, nread_rtrn=0x0)
    at ../../../src/xkb/XKBGetMap.c:206
        sz = <value optimized out>
        prev_syms = (KeySym *) 0x855c7b8
        extraData = <value optimized out>
        mask = <value optimized out>
#1 0xb76df864 in _XkbHandleGetMapReply (dpy=0x8086108, xkb=0x8557fc0) at ../../../src/xkb/XKBGetMap.c:526
        rep = {type = 1 '\001', deviceID = 4 '\004', sequenceNumber = 843, length = 1010, pad1 = 0, minKeyCode = 8 '\b',
  maxKeyCode = 255 '�', present = 71, firstType = 0 '\0', nTypes = 18 '\022', totalTypes = 18 '\022',
  firstKeySym = 8 '\b', totalSyms = 289, nKeySyms = 248 '�', firstKeyAct = 0 '\0', totalActs = 0, nKeyActs = 0 '\0',
  firstKeyBehavior = 0 '\0', nKeyBehaviors = 0 '\0', totalKeyBehaviors = 0 '\0', firstKeyExplicit = 0 '\0',
  nKeyExplicit = 0 '\0', totalKeyExplicit = 0 '\0', firstModMapKey = 8 '\b', nModMapKeys = 248 '
  totalModMapKeys = 14 '\016', firstVModMapKey = 0 '\0', nVModMapKeys = 0 '\0', totalVModMapKeys = 0 '\0', pad2 = 0 '\0',
  virtualMods = 65535}
#2 0xb76e0204 in XkbGetUpdatedMap (dpy=0x8086108, which=71, xkb=0x8557fc0) at ../../../src/xkb/XKBGetMap.c:543
        req = <value optimized out>
        status = 0
#3 0xb76e02c4 in XkbGetMap (dpy=0x8086108, which=71, deviceSpec=256) at ../../../src/xkb/XKBGetMap.c:561
        xkb = (XkbDescPtr) 0x8557fc0
#4 0xb7bd4950 in get_xkb (keymap_x11=0x855a038) at gdkkeys-x11.c:256
        display_x11 = (GdkDisplayX11 *) 0x808e098
        xdisplay = (Display *) 0x8086108
#5 0xb7bd4f3f in update_direction (keymap_x11=0x85c3ae8, group=65825) at gdkkeys-x11.c:591
        xkb = <value optimized out>
        group_atom = 0
#6 0xb7bd5178 in IA__gdk_keymap_get_direction (keymap=0x855a038) at gdkkeys-x11.c:713
        state_rec = {group = 0 '\0', locked_group = 0 '\0', base_group = 0, latched_group = 0, mods = 0 '\0',
  base_mods = 0 '\0', latched_mods = 0 '\0', locked_mods = 0 '\0', compat_state = 0 '\0', grab_mods = 0 '\0',
  compat_grab_mods = 0 '\0', lookup_mods = 0 '\0', compat_lookup_mods = 0 '\0', ptr_buttons = 0}
        __PRETTY_FUNCTION__ = "IA__gdk_keymap_get_direction"
#7 0xb7ccfb25 in gtk_entry_ensure_layout (entry=0x82080a8, include_preedit=1) at gtkentry.c:3251
No locals.
#8 0xb7cd3033 in gtk_entry_adjust_scroll (entry=0x82080a8) at gtkentry.c:3705
        min_offset = <value optimized out>
        max_offset = <value optimized out>
        text_area_width = 152
        text_width = <value optimized out>
        inner_border = {left = 2, right = 2, top = 2, bottom = 2}
        strong_x = <value optimized out>
        weak_x = <value optimized out>
        strong_xoffset = <value optimized out>
        weak_xoffset = <value optimized out>
        xalign = 1.9375
        layout = <value optim...

The bug has been opened on https://launchpad.net/bugs/94737

"Binary package hint: gdm

crash when I used xdmcp server
...
libx11-6 2:1.1.1-1ubuntu1
...
http://librarian.launchpad.net/6898243/ThreadStacktrace.txt
ThreadStacktrace.txt
..."

Debug backtrace for the crash:

206                     map->syms[offset]= 0;
(gdb) thread apply all bt full

Thread 1 (process 5372):
#0  0xb76df41b in _XkbReadGetMapReply (dpy=0x8086108, rep=0xbf8e97a4, xkb=0x8557fc0, nread_rtrn=0x0)
    at ../../../src/xkb/XKBGetMap.c:206
        sz = <value optimized out>
        prev_syms = (KeySym *) 0x855c7b8
        extraData = <value optimized out>
        mask = <value optimized out>
#1  0xb76df864 in _XkbHandleGetMapReply (dpy=0x8086108, xkb=0x8557fc0) at ../../../src/xkb/XKBGetMap.c:526
        rep = {type = 1 '\001', deviceID = 4 '\004', sequenceNumber = 843, length = 1010, pad1 = 0, minKeyCode = 8 '\b', 
  maxKeyCode = 255 '�', present = 71, firstType = 0 '\0', nTypes = 18 '\022', totalTypes = 18 '\022', 
  firstKeySym = 8 '\b', totalSyms = 289, nKeySyms = 248 '�', firstKeyAct = 0 '\0', totalActs = 0, nKeyActs = 0 '\0', 
  firstKeyBehavior = 0 '\0', nKeyBehaviors = 0 '\0', totalKeyBehaviors = 0 '\0', firstKeyExplicit = 0 '\0', 
  nKeyExplicit = 0 '\0', totalKeyExplicit = 0 '\0', firstModMapKey = 8 '\b', nModMapKeys = 248 '
  totalModMapKeys = 14 '\016', firstVModMapKey = 0 '\0', nVModMapKeys = 0 '\0', totalVModMapKeys = 0 '\0', pad2 = 0 '\0', 
  virtualMods = 65535}
#2  0xb76e0204 in XkbGetUpdatedMap (dpy=0x8086108, which=71, xkb=0x8557fc0) at ../../../src/xkb/XKBGetMap.c:543
        req = <value optimized out>
        status = 0
#3  0xb76e02c4 in XkbGetMap (dpy=0x8086108, which=71, deviceSpec=256) at ../../../src/xkb/XKBGetMap.c:561
        xkb = (XkbDescPtr) 0x8557fc0
#4  0xb7bd4950 in get_xkb (keymap_x11=0x855a038) at gdkkeys-x11.c:256
        display_x11 = (GdkDisplayX11 *) 0x808e098
        xdisplay = (Display *) 0x8086108
#5  0xb7bd4f3f in update_direction (keymap_x11=0x85c3ae8, group=65825) at gdkkeys-x11.c:591
        xkb = <value optimized out>
        group_atom = 0
#6  0xb7bd5178 in IA__gdk_keymap_get_direction (keymap=0x855a038) at gdkkeys-x11.c:713
        state_rec = {group = 0 '\0', locked_group = 0 '\0', base_group = 0, latched_group = 0, mods = 0 '\0', 
  base_mods = 0 '\0', latched_mods = 0 '\0', locked_mods = 0 '\0', compat_state = 0 '\0', grab_mods = 0 '\0', 
  compat_grab_mods = 0 '\0', lookup_mods = 0 '\0', compat_lookup_mods = 0 '\0', ptr_buttons = 0}
        __PRETTY_FUNCTION__ = "IA__gdk_keymap_get_direction"
#7  0xb7ccfb25 in gtk_entry_ensure_layout (entry=0x82080a8, include_preedit=1) at gtkentry.c:3251
No locals.
#8  0xb7cd3033 in gtk_entry_adjust_scroll (entry=0x82080a8) at gtkentry.c:3705
        min_offset = <value optimized out>
        max_offset = <value optimized out>
        text_area_width = 152
        text_width = <value optimized out>
        inner_border = {left = 2, right = 2, top = 2, bottom = 2}
        strong_x = <value optimized out>
        weak_x = <value optimized out>
        strong_xoffset = <value optimized out>
        weak_xoffset = <value optimized out>
        xalign = 1.9375
        layout = <value optimized out>
---Type <return> to continue, or q <return> to quit---
        logical_rect = {x = 136347816, y = 1079488016, width = -1218125536, height = -1208607828}
#9  0xb7cd31c7 in recompute_idle_func (data=0x82080a8) at gtkentry.c:3111
        entry = (GtkEntry *) 0x85c3ae8
#10 0xb78db091 in g_idle_dispatch (source=0x8556bf0, callback=0x10121, user_data=0x82080a8) at gmain.c:3928
No locals.
#11 0xb78dcdf2 in IA__g_main_context_dispatch (context=0x80953c0) at gmain.c:2045
No locals.
#12 0xb78dfdcf in g_main_context_iterate (context=0x80953c0, block=1, dispatch=1, self=0x80a3d18) at gmain.c:2677
        got_ownership = <value optimized out>
        max_priority = 115
        timeout = 0
        some_ready = 1
        nfds = <value optimized out>
        allocated_nfds = <value optimized out>
        fds = (GPollFD *) 0x8096df0
        __PRETTY_FUNCTION__ = "g_main_context_iterate"
#13 0xb78e0179 in IA__g_main_loop_run (loop=0x8517778) at gmain.c:2881
        got_ownership = 0
        self = (GThread *) 0x80a3d18
        __PRETTY_FUNCTION__ = "IA__g_main_loop_run"
#14 0xb7d4c044 in IA__gtk_main () at gtkmain.c:1177
        tmp_list = (GList *) 0x0
        functions = (GList *) 0x0
        init = (GtkInitFunction *) 0x0
        loop = (GMainLoop *) 0x8517778
#15 0x08051925 in ?? ()
No symbol table info available.
#16 0x0854f320 in ?? ()
No symbol table info available.
#17 0x080992b0 in ?? ()
No symbol table info available.
#18 0x080526b0 in ?? ()
No symbol table info available.
#19 0x00000000 in ?? ()
No symbol table info available.

(gdb) p *xkb->map->syms
$1 = 0

Revision history for this message

In freedesktop.org Bugzilla #10383, Daniel Stone (daniels) wrote on 2007-03-23:

#4

what's the value of offset at the time, and what are xkb->map->{num,size}_syms?

Revision history for this message

In freedesktop.org Bugzilla #10383, Sebastien Bacher (seb128) wrote on 2007-03-23:

#5

(gdb) p xkb->map
$1 = (XkbClientMapPtr) 0x853c0f0
(gdb) p xkb->map->num_syms
$2 = 0
(gdb) p xkb->map->size_syms
$3 = 6144
(gdb) p offset
No symbol "offset" in current context.

Do you have any idea why the offset value is not available?

Revision history for this message

In freedesktop.org Bugzilla #10383, Daniel Stone (daniels) wrote on 2007-03-23:

#6

Egh, size_syms is clearly bogus. offset won't be available if the loop gets unrolled, IIRC. Depends on the level of optimisation.

Revision history for this message

Sebastien Bacher (seb128) wrote on 2007-03-23:

#7

Download full text (4.4 KiB)

Debug backtrace for the crash:

(gdb) thread apply all bt full

Thread 1 (process 5372):
#0 0xb76df41b in _XkbReadGetMapReply (dpy=0x8086108, rep=0xbf8e97a4, xkb=0x8557fc0, nread_rtrn=0x0)
    at ../../../src/xkb/XKBGetMap.c:206
        sz = <value optimized out>
        prev_syms = (KeySym *) 0x855c7b8
        extraData = <value optimized out>
        mask = <value optimized out>
#1 0xb76df864 in _XkbHandleGetMapReply (dpy=0x8086108, xkb=0x8557fc0) at ../../../src/xkb/XKBGetMap.c:526
        rep = {type = 1 '\001', deviceID = 4 '\004', sequenceNumber = 843, length = 1010, pad1 = 0, minKeyCode = 8 '\b',
  maxKeyCode = 255 '�', present = 71, firstType = 0 '\0', nTypes = 18 '\022', totalTypes = 18 '\022',
  firstKeySym = 8 '\b', totalSyms = 289, nKeySyms = 248 '�', firstKeyAct = 0 '\0', totalActs = 0, nKeyActs = 0 '\0',
  firstKeyBehavior = 0 '\0', nKeyBehaviors = 0 '\0', totalKeyBehaviors = 0 '\0', firstKeyExplicit = 0 '\0',
  nKeyExplicit = 0 '\0', totalKeyExplicit = 0 '\0', firstModMapKey = 8 '\b', nModMapKeys = 248 '
  totalModMapKeys = 14 '\016', firstVModMapKey = 0 '\0', nVModMapKeys = 0 '\0', totalVModMapKeys = 0 '\0', pad2 = 0 '\0',
  virtualMods = 65535}
#2 0xb76e0204 in XkbGetUpdatedMap (dpy=0x8086108, which=71, xkb=0x8557fc0) at ../../../src/xkb/XKBGetMap.c:543
        req = <value optimized out>
        status = 0
#3 0xb76e02c4 in XkbGetMap (dpy=0x8086108, which=71, deviceSpec=256) at ../../../src/xkb/XKBGetMap.c:561
        xkb = (XkbDescPtr) 0x8557fc0
#4 0xb7bd4950 in get_xkb (keymap_x11=0x855a038) at gdkkeys-x11.c:256
        display_x11 = (GdkDisplayX11 *) 0x808e098
        xdisplay = (Display *) 0x8086108
#5 0xb7bd4f3f in update_direction (keymap_x11=0x85c3ae8, group=65825) at gdkkeys-x11.c:591
        xkb = <value optimized out>
        group_atom = 0
#6 0xb7bd5178 in IA__gdk_keymap_get_direction (keymap=0x855a038) at gdkkeys-x11.c:713
        state_rec = {group = 0 '\0', locked_group = 0 '\0', base_group = 0, latched_group = 0, mods = 0 '\0',
  base_mods = 0 '\0', latched_mods = 0 '\0', locked_mods = 0 '\0', compat_state = 0 '\0', grab_mods = 0 '\0',
  compat_grab_mods = 0 '\0', lookup_mods = 0 '\0', compat_lookup_mods = 0 '\0', ptr_buttons = 0}
        __PRETTY_FUNCTION__ = "IA__gdk_keymap_get_direction"
#7 0xb7ccfb25 in gtk_entry_ensure_layout (entry=0x82080a8, include_preedit=1) at gtkentry.c:3251
No locals.
#8 0xb7cd3033 in gtk_entry_adjust_scroll (entry=0x82080a8) at gtkentry.c:3705
        min_offset = <value optimized out>
        max_offset = <value optimized out>
        text_area_width = 152
        text_width = <value optimized out>
        inner_border = {left = 2, right = 2, top = 2, bottom = 2}
        strong_x = <value optimized out>
        weak_x = <value optimized out>
        strong_xoffset = <value optimized out>
        weak_xoffset = <value optimized out>
        xalign = 1.9375
        layout = <value optimized out>
---Type <return> to continue, or q <return> to quit---
        logical_rect = {x = 136347816, y = 1079488016, width = -1218125536, height = -1208607828}
#9 0xb7cd31c7 in recompute_idle_func (data=0x82080a8) at gtkentry.c:3111
        entry = (GtkEntry *) 0x85c3ae8
#10 0xb78d...

Debug backtrace for the crash:

(gdb) thread apply all bt full

Thread 1 (process 5372):
#0  0xb76df41b in _XkbReadGetMapReply (dpy=0x8086108, rep=0xbf8e97a4, xkb=0x8557fc0, nread_rtrn=0x0)
    at ../../../src/xkb/XKBGetMap.c:206
        sz = <value optimized out>
        prev_syms = (KeySym *) 0x855c7b8
        extraData = <value optimized out>
        mask = <value optimized out>
#1  0xb76df864 in _XkbHandleGetMapReply (dpy=0x8086108, xkb=0x8557fc0) at ../../../src/xkb/XKBGetMap.c:526
        rep = {type = 1 '\001', deviceID = 4 '\004', sequenceNumber = 843, length = 1010, pad1 = 0, minKeyCode = 8 '\b', 
  maxKeyCode = 255 '�', present = 71, firstType = 0 '\0', nTypes = 18 '\022', totalTypes = 18 '\022', 
  firstKeySym = 8 '\b', totalSyms = 289, nKeySyms = 248 '�', firstKeyAct = 0 '\0', totalActs = 0, nKeyActs = 0 '\0', 
  firstKeyBehavior = 0 '\0', nKeyBehaviors = 0 '\0', totalKeyBehaviors = 0 '\0', firstKeyExplicit = 0 '\0', 
  nKeyExplicit = 0 '\0', totalKeyExplicit = 0 '\0', firstModMapKey = 8 '\b', nModMapKeys = 248 '
  totalModMapKeys = 14 '\016', firstVModMapKey = 0 '\0', nVModMapKeys = 0 '\0', totalVModMapKeys = 0 '\0', pad2 = 0 '\0', 
  virtualMods = 65535}
#2  0xb76e0204 in XkbGetUpdatedMap (dpy=0x8086108, which=71, xkb=0x8557fc0) at ../../../src/xkb/XKBGetMap.c:543
        req = <value optimized out>
        status = 0
#3  0xb76e02c4 in XkbGetMap (dpy=0x8086108, which=71, deviceSpec=256) at ../../../src/xkb/XKBGetMap.c:561
        xkb = (XkbDescPtr) 0x8557fc0
#4  0xb7bd4950 in get_xkb (keymap_x11=0x855a038) at gdkkeys-x11.c:256
        display_x11 = (GdkDisplayX11 *) 0x808e098
        xdisplay = (Display *) 0x8086108
#5  0xb7bd4f3f in update_direction (keymap_x11=0x85c3ae8, group=65825) at gdkkeys-x11.c:591
        xkb = <value optimized out>
        group_atom = 0
#6  0xb7bd5178 in IA__gdk_keymap_get_direction (keymap=0x855a038) at gdkkeys-x11.c:713
        state_rec = {group = 0 '\0', locked_group = 0 '\0', base_group = 0, latched_group = 0, mods = 0 '\0', 
  base_mods = 0 '\0', latched_mods = 0 '\0', locked_mods = 0 '\0', compat_state = 0 '\0', grab_mods = 0 '\0', 
  compat_grab_mods = 0 '\0', lookup_mods = 0 '\0', compat_lookup_mods = 0 '\0', ptr_buttons = 0}
        __PRETTY_FUNCTION__ = "IA__gdk_keymap_get_direction"
#7  0xb7ccfb25 in gtk_entry_ensure_layout (entry=0x82080a8, include_preedit=1) at gtkentry.c:3251
No locals.
#8  0xb7cd3033 in gtk_entry_adjust_scroll (entry=0x82080a8) at gtkentry.c:3705
        min_offset = <value optimized out>
        max_offset = <value optimized out>
        text_area_width = 152
        text_width = <value optimized out>
        inner_border = {left = 2, right = 2, top = 2, bottom = 2}
        strong_x = <value optimized out>
        weak_x = <value optimized out>
        strong_xoffset = <value optimized out>
        weak_xoffset = <value optimized out>
        xalign = 1.9375
        layout = <value optimized out>
---Type <return> to continue, or q <return> to quit---
        logical_rect = {x = 136347816, y = 1079488016, width = -1218125536, height = -1208607828}
#9  0xb7cd31c7 in recompute_idle_func (data=0x82080a8) at gtkentry.c:3111
        entry = (GtkEntry *) 0x85c3ae8
#10 0xb78db091 in g_idle_dispatch (source=0x8556bf0, callback=0x10121, user_data=0x82080a8) at gmain.c:3928
No locals.
#11 0xb78dcdf2 in IA__g_main_context_dispatch (context=0x80953c0) at gmain.c:2045
No locals.
#12 0xb78dfdcf in g_main_context_iterate (context=0x80953c0, block=1, dispatch=1, self=0x80a3d18) at gmain.c:2677
        got_ownership = <value optimized out>
        max_priority = 115
        timeout = 0
        some_ready = 1
        nfds = <value optimized out>
        allocated_nfds = <value optimized out>
        fds = (GPollFD *) 0x8096df0
        __PRETTY_FUNCTION__ = "g_main_context_iterate"
#13 0xb78e0179 in IA__g_main_loop_run (loop=0x8517778) at gmain.c:2881
        got_ownership = 0
        self = (GThread *) 0x80a3d18
        __PRETTY_FUNCTION__ = "IA__g_main_loop_run"
#14 0xb7d4c044 in IA__gtk_main () at gtkmain.c:1177
        tmp_list = (GList *) 0x0
        functions = (GList *) 0x0
        init = (GtkInitFunction *) 0x0
        loop = (GMainLoop *) 0x8517778
#15 0x08051925 in ?? ()
No symbol table info available.
#16 0x0854f320 in ?? ()
No symbol table info available.
#17 0x080992b0 in ?? ()
No symbol table info available.
#18 0x080526b0 in ?? ()
No symbol table info available.
#19 0x00000000 in ?? ()
No symbol table info available.

Revision history for this message

Sebastien Bacher (seb128) wrote on 2007-03-23:

#8

Reassigning to libx11, might be also GTK using wrong arguments, the lib should not crash though

Changed in gdm:
assignee:	desktop-bugs → nobody
status:	Unconfirmed → Confirmed

Revision history for this message

Sebastien Bacher (seb128) wrote on 2007-03-23:

#9

I've forwarded that upstream: https://bugs.freedesktop.org/show_bug.cgi?id=10383

Bug Watch Updater (bug-watch-updater) on 2007-12-04

Changed in xorg-server:
status:	Unknown → Confirmed

Revision history for this message

Bryce Harrington (bryce) wrote on 2009-01-26:

#10

It's been a considerable time since the last comment on this issue, and Xkb has undergone significant reworking. Are you still having the problem with the more current versions of Ubuntu?

Changed in libx11:
status:	Confirmed → Incomplete

Revision history for this message

Bryce Harrington (bryce) wrote on 2009-03-02:

#11

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.

Changed in xorg-server:
status:	Incomplete → Invalid

Bug Watch Updater (bug-watch-updater) on 2010-09-14

Changed in xorg-server:
importance:	Unknown → Medium

Bug Watch Updater (bug-watch-updater) on 2011-01-25

Changed in xorg-server:
importance:	Medium → Unknown

Bug Watch Updater (bug-watch-updater) on 2011-02-05

Changed in xorg-server:
importance:	Unknown → Medium

Bug Watch Updater (bug-watch-updater) on 2011-10-02

Changed in xorg-server:
status:	Confirmed → Invalid

Affects		Status	Importance	Assigned to	Milestone
	X.Org X server	Invalid	Medium	freedesktop-bugs #10383
	xorg-server (Ubuntu)	Invalid	Medium	Unassigned

Ubuntu
xorg-server package

[apport] gdmgreeter crashed with SIGSEGV in _XkbReadGetMapReply()

Bug Description

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Ubuntuxorg-server package

[apport] gdmgreeter crashed with SIGSEGV in _XkbReadGetMapReply()

Bug Description

Other bug subscribers

Bug attachments

Remote bug watches

Ubuntu
xorg-server package