[X2Go-User] Cannot launch GThumb (double free or corruption)
Nicolas Ecarnot
nicolas.x2go at ecarnot.net
Mon Nov 25 15:13:44 CET 2019
Here are all the answers :
nico at furon:~$ export MALLOC_CHECK_=0
nico at furon:~$ gthumb
free(): double free detected in tcache 2
Abandon (core dumped)
nico at furon:~$ dpkg --list|grep -i nxagent
ii libnx-x11-6:amd64 2:3.5.99.21-3build1
amd64 nxagent's libNX_X11 client-part library
ii nxagent 2:3.5.99.21-3build1
amd64 Nested Xserver (aka NX Agent) supporting the
NX compression protocol
nico at furon:~$ xdpyinfo
name of display: :50.0
version number: 11.0
vendor string: The X.Org Foundation
vendor release number: 70000000
X.Org version: 7.0.0
maximum request size: 16777212 bytes
motion buffer size: 256
bitmap unit, bit order, padding: 32, LSBFirst, 32
image byte order: LSBFirst
number of supported pixmap formats: 7
supported pixmap formats:
depth 1, bits_per_pixel 1, scanline_pad 32
depth 4, bits_per_pixel 8, scanline_pad 32
depth 8, bits_per_pixel 8, scanline_pad 32
depth 15, bits_per_pixel 16, scanline_pad 32
depth 16, bits_per_pixel 16, scanline_pad 32
depth 24, bits_per_pixel 32, scanline_pad 32
depth 32, bits_per_pixel 32, scanline_pad 32
keycode range: minimum 8, maximum 255
focus: window 0x2e000ab, revert to Parent
number of extensions: 23
BIG-REQUESTS
DAMAGE
DOUBLE-BUFFER
DPMS
GLX
MIT-SCREEN-SAVER
MIT-SHM
RANDR
RECORD
RENDER
SECURITY
SGI-GLX
SHAPE
SYNC
X-Resource
XC-MISC
XFIXES
XFree86-Bigfont
XINERAMA
XInputExtension
XKEYBOARD
XTEST
XVideo
default screen number: 0
number of screens: 1
screen #0:
dimensions: 1918x1000 pixels (507x265 millimeters)
resolution: 96x96 dots per inch
depths (7): 24, 1, 4, 8, 15, 16, 32
root window id: 0x229
depth of root window: 24 planes
number of colormaps: minimum 1, maximum 1
default colormap: 0x20d
default number of colormap cells: 256
preallocated pixels: black 0, white 16777215
options: backing-store YES, save-unders YES
largest cursor: 1920x1000
current input event mask: 0xfa803f
KeyPressMask KeyReleaseMask ButtonPressMask
ButtonReleaseMask EnterWindowMask LeaveWindowMask
ExposureMask StructureNotifyMask
SubstructureNotifyMask
SubstructureRedirectMask FocusChangeMask
PropertyChangeMask
ColormapChangeMask
number of visuals: 8
default visual id: 0x205
visual:
visual id: 0x205
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x206
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x207
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x208
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x209
class: DirectColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x20a
class: DirectColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x20b
class: DirectColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x20c
class: DirectColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
nico at furon:~$
nico at furon:~$ cat /etc/x2go/x2goagent.options
#
# This file can be used to specify default options that are passed to
nxagent.
#
# These options can be overridden by the client!
#
# See the output of `nxagent -help` for the full list of options.
#
# Remember:
# "-extension" disables an extension.
# "+extension" enables an extension.
X2GO_NXAGENT_DEFAULT_OPTIONS=""
# Uncomment to disable GLX, the old mesa version is hopelessly outdated
anyways.
# Unbreaks the gnome3 control center
#
#X2GO_NXAGENT_DEFAULT_OPTIONS+=" -extension GLX"
# Launch X2Go's X-server x2goagent with option "-nolisten tcp".
#
# This is the default setting and the X2Go developers really recommend
not to
# touch this. However, if you play with this (i.e. if you comment it
out) you
# should really know what you are doing.
#
# For everyone else: don't touch the line below!!!
X2GO_NXAGENT_DEFAULT_OPTIONS+=" -nolisten tcp"
# Enforce clipboard behaviour in X2Go sessions globally (for all
connecting clients)
# Possible values for the -clipboard option: both, server, client, none
# If this option stays commented out, clients can choose the sessions'
clipboard behaviour...
#X2GO_NXAGENT_DEFAULT_OPTIONS+=" -clipboard both"
# BIG-REQUESTS can be problematic. Older versions of nx-libs did not
implement
# this extension correctly, leading to all sorts of weird crashes if left
# enabled.
# Newer versions should handle this extension much better, but if you see
# crashes related to BIG-REQUESTS, uncomment this line to disable the
# extension.
#X2GO_NXAGENT_DEFAULT_OPTIONS+=" -extension BIG-REQUESTS"
# Extra nxagent nx/nx options, separated by commas. For example: sleep=0
X2GO_NXOPTIONS=""
Le 25/11/2019 à 14:38, Ulrich Sibiller a écrit :
> On Mon, Nov 25, 2019 at 1:49 PM Nicolas Ecarnot
> <nicolas.x2go at ecarnot.net> wrote:
>> I tried this, to no avail.
>>
>> I still don't understand why it fails while in the x2go context, and
>> runs when being run locally.
>>
>> Are there env. params I should check / compare ?
>
>
> This is interesting. So setting MALLOC_CHECK_=0 does not change
> anything? (have you checked that you included the _ at the end of the
> variable name?).
>
> X2go is using nxagent. nxagent is an Xserver. It is - feature-wise -
> not on par with the current (local) X server you are probably using
> (or maybe you are using wayland locally?). So maybe gthumb is not
> correctly checking if the X server feature set is the one it expects.
>
> What version of nxagent are you using?
>
> Am I right that your X2go connection is not dying?
>
> Can you run xdpyinfo inside your session and post the output regarding
> extensions? Can you also please post your server-side
> /etc/x2go/x2goagent.options?
>
> Uli
>
--
Nicolas ECARNOT
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