Xtightvnc Segfaults...
tony tonysown.net <[email protected]> Sun, 3 Mar 2024 17:39:42 +0000
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I posted this on Ask Ubuntu, as well, but so far, the only response I've go=
tten is basically "Don't use VNC."
I'm having an issue which is driving me nuts. I've been trying to move over=
to Ubuntu 22 (from 18 right now) but can't get a stable VNC environment.
I installed 22.04 LTS it via Hyper-V Quick Create. I updated everything wit=
h "sudo apt update" and "... upgrade" right from the get-go.
I then installed xfce4, xfce4-goodies, and tightvncserver.
My .vnc/xstartup script:
#!/bin/bash
unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS
xrdb $HOME/.Xresources
startxfce4 &
Sessions fail after a random amount of time (sometimes hours, sometimes les=
s, like below). When it runs "normally," certain other things (most notably=
LibreOffice) will crash the VNC server when doing something as simple as c=
losing a document.
Whenever it happens, the VNC client gives the error "Failed to recv data fr=
om remote socket."
I see this in /var/log/kern.log:
Mar 2 12:23:37 mars kernel: [ 1281.469703] xiccd[4832]: segfault at e4 ip =
000055ede2bd84f6 sp 00007ffc2ece1300 error 4 in xiccd[55ede2bd4000+5000] li=
kely on CPU 3 (core 1, socket 0)
Mar 2 12:26:43 mars kernel: [ 1467.206087] Xtightvnc[4681]: segfault at 7f=
ff82e42d08 ip 000055f205d65a76 sp 00007fff82e41d10 error 6 in Xtightvnc[55f=
205c34000+137000] likely on CPU 2 (core 1, socket 0)
The ip/sp pointers are different every time I've compared.
What's really curious is, despite MONTHS of searching, I'm not finding anyo=
ne else reporting similar issues. Surely I can't be alone. :)
I've used this arrangement / configuration since probably Ubuntu 14 without=
issue, but can't get past this in 20.04 or 22.04. I've given the VM 6 vCPU=
s and 8GB of memory. They hypervisor has an 8th Gen Core i7 with 6 CPUs/12 =
threads and 48GB of memory.
Any suggestions would be greatly appreciated.
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<p class=3D"MsoNormal" style=3D"margin-bottom:13.2pt;background:white;verti=
cal-align:baseline">
<span style=3D"font-size:11.5pt;font-family:"Segoe UI",sans-serif=
;color:#0C0D0E;mso-ligatures:none">I posted this on Ask Ubuntu, as well, bu=
t so far, the only response I’ve gotten is basically “Don’=
;t use VNC.”<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:13.2pt;background:white;verti=
cal-align:baseline">
<span style=3D"font-size:11.5pt;font-family:"Segoe UI",sans-serif=
;color:#0C0D0E;mso-ligatures:none">I'm having an issue which is driving me =
nuts. I've been trying to move over to Ubuntu 22 (from 18 right now) but ca=
n't get a stable VNC environment.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:13.2pt;background:white;verti=
cal-align:baseline">
<span style=3D"font-size:11.5pt;font-family:"Segoe UI",sans-serif=
;color:#0C0D0E;mso-ligatures:none">I installed 22.04 LTS it via Hyper-V Qui=
ck Create. I updated everything with “sudo apt update” and R=
20;… upgrade” right from the get-go.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:13.2pt;background:white;verti=
cal-align:baseline">
<span style=3D"font-size:11.5pt;font-family:"Segoe UI",sans-serif=
;color:#0C0D0E;mso-ligatures:none">I then installed xfce4, xfce4-goodies, a=
nd tightvncserver.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:13.2pt;background:white;verti=
cal-align:baseline">
<span style=3D"font-size:11.5pt;font-family:"Segoe UI",sans-serif=
;color:#0C0D0E;mso-ligatures:none">My .vnc/xstartup script:<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"vertical-align:baseline"><span style=3D"fon=
t-size:10.0pt;font-family:"Courier New";color:#0C0D0E;border:none=
windowtext 1.0pt;padding:0in;mso-ligatures:none">#!/bin/bash<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"vertical-align:baseline"><span style=3D"fon=
t-size:10.0pt;font-family:"Courier New";color:#0C0D0E;border:none=
windowtext 1.0pt;padding:0in;mso-ligatures:none">unset SESSION_MANAGER<o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"vertical-align:baseline"><span style=3D"fon=
t-size:10.0pt;font-family:"Courier New";color:#0C0D0E;border:none=
windowtext 1.0pt;padding:0in;mso-ligatures:none">unset DBUS_SESSION_BUS_AD=
DRESS</span><span style=3D"font-size:10.0pt;font-family:"var(--ff-mono=
)",serif;color:#0C0D0E;border:none windowtext 1.0pt;padding:0in;mso-li=
gatures:none"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"vertical-align:baseline"><span style=3D"fon=
t-size:10.0pt;font-family:"var(--ff-mono)",serif;color:#0C0D0E;bo=
rder:none windowtext 1.0pt;padding:0in;mso-ligatures:none"><o:p> </o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"vertical-align:baseline"><span style=3D"fon=
t-size:10.0pt;font-family:"Courier New";color:#0C0D0E;border:none=
windowtext 1.0pt;padding:0in;mso-ligatures:none">xrdb $HOME/.Xresources<o:=
p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"vertical-align:baseline"><span style=3D"fon=
t-size:10.0pt;font-family:"Courier New";color:#0C0D0E;border:none=
windowtext 1.0pt;padding:0in;mso-ligatures:none">startxfce4 &<o:p></o:=
p></span></p>
<p class=3D"MsoNormal" style=3D"vertical-align:baseline"><span style=3D"fon=
t-size:10.0pt;font-family:"Courier New";color:#0C0D0E;border:none=
windowtext 1.0pt;padding:0in;mso-ligatures:none"><o:p> </o:p></span><=
/p>
<p class=3D"MsoNormal" style=3D"vertical-align:baseline"><span style=3D"fon=
t-size:10.0pt;font-family:"Courier New";color:#0C0D0E;border:none=
windowtext 1.0pt;padding:0in;mso-ligatures:none"><o:p> </o:p></span><=
/p>
<p class=3D"MsoNormal" style=3D"margin-bottom:13.2pt;background:white;verti=
cal-align:baseline">
<span style=3D"font-size:11.5pt;font-family:"Segoe UI",sans-serif=
;color:#0C0D0E;mso-ligatures:none">Sessions fail after a random amount of t=
ime (sometimes hours, sometimes less, like below). When it runs "norma=
lly," certain other things (most notably LibreOffice)
will crash the VNC server when doing something as simple as closing a docu=
ment.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:13.2pt;background:white;verti=
cal-align:baseline">
<span style=3D"font-size:11.5pt;font-family:"Segoe UI",sans-serif=
;color:#0C0D0E;mso-ligatures:none">Whenever it happens, the VNC client give=
s the error "Failed to recv data from remote socket."<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:13.2pt;background:white;verti=
cal-align:baseline">
<span style=3D"font-size:11.5pt;font-family:"Segoe UI",sans-serif=
;color:#0C0D0E;mso-ligatures:none">I see this in /var/log/kern.log:<o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"vertical-align:baseline"><span style=3D"fon=
t-size:10.0pt;font-family:"Courier New";color:#0C0D0E;border:none=
windowtext 1.0pt;padding:0in;mso-ligatures:none">Mar 2 12:23:37 mars=
kernel: [ 1281.469703] xiccd[4832]: segfault at e4 ip
000055ede2bd84f6 sp 00007ffc2ece1300 error 4 in xiccd[55ede2bd4000+5000] l=
ikely on CPU 3 (core 1, socket 0)<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"vertical-align:baseline"><span style=3D"fon=
t-size:10.0pt;font-family:"Courier New";color:#0C0D0E;border:none=
windowtext 1.0pt;padding:0in;mso-ligatures:none">Mar 2 12:26:43 mars=
kernel: [ 1467.206087] Xtightvnc[4681]: segfault at
7fff82e42d08 ip 000055f205d65a76 sp 00007fff82e41d10 error 6 in Xtightvnc[=
55f205c34000+137000] likely on CPU 2 (core 1, socket 0)</span><span style=
=3D"font-size:10.0pt;font-family:"var(--ff-mono)",serif;color:#0C=
0D0E;border:none windowtext 1.0pt;padding:0in;mso-ligatures:none"><o:p></o:=
p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:13.2pt;background:white;verti=
cal-align:baseline">
<span style=3D"font-size:11.5pt;font-family:"Segoe UI",sans-serif=
;color:#0C0D0E;mso-ligatures:none"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:13.2pt;background:white;verti=
cal-align:baseline">
<span style=3D"font-size:11.5pt;font-family:"Segoe UI",sans-serif=
;color:#0C0D0E;mso-ligatures:none">The ip/sp pointers are different every t=
ime I've compared.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:13.2pt;background:white;verti=
cal-align:baseline">
<span style=3D"font-size:11.5pt;font-family:"Segoe UI",sans-serif=
;color:#0C0D0E;mso-ligatures:none">What's really curious is, despite MONTHS=
of searching, I'm not finding anyone else reporting similar issues. Surely=
I can't be alone. :)<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:13.2pt;background:white;verti=
cal-align:baseline">
<span style=3D"font-size:11.5pt;font-family:"Segoe UI",sans-serif=
;color:#0C0D0E;mso-ligatures:none">I've used this arrangement / configurati=
on since probably Ubuntu 14 without issue, but can't get past this in 20.04=
or 22.04. I've given the VM 6 vCPUs and 8GB
of memory. They hypervisor has an 8th Gen Core i7 with 6 CPUs/12 threads a=
nd 48GB of memory.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white;vertical-align:baseline"><=
span style=3D"font-size:11.5pt;font-family:"Segoe UI",sans-serif;=
color:#0C0D0E;mso-ligatures:none">Any suggestions would be </span><b><=
span style=3D"font-size:11.5pt;font-family:"inherit",serif;color:=
#0C0D0E;border:none windowtext 1.0pt;padding:0in;mso-ligatures:none">greatl=
y</span></b><span style=3D"font-size:11.5pt;font-family:"Segoe UI"=
;,sans-serif;color:#0C0D0E;mso-ligatures:none"> appreciated.<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
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