Bug#762211: lightdm crashes on startup, system falls back to console

2014-10-10 Thread John Paul Adrian Glaubitz
Hello Pat!

> After updating lightdm to latest testing version I am having the
> same results but an error appears in the logs.
> segfault at * error 4 in libc-2.19.so

You need to upgrade to 1.10.3-1 from unstable!

Adrian

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Bug#762211: lightdm crashes on startup, system falls back to console

2014-10-09 Thread Pat Parson
Package: lightdm
Version: 1.10.2-2
Followup-For: Bug #762211

Dear Maintainer,

I am having this problem again, this time liblightdm-gobject is not the 
apparent cause.
After updating lightdm to latest testing version I am having the same results 
but an error appears in the logs.
segfault at * error 4 in libc-2.19.so

-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (993, 'testing'), (993, 'stable'), (992, 'proposed-updates'), 
(991, 'stable-updates'), (550, 'testing'), (550, 'stable')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-4-686-pae (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages lightdm depends on:
ii  adduser3.113+nmu3
ii  consolekit 0.4.6-5
ii  dbus   1.6.8-1+deb7u4
ii  debconf [debconf-2.0]  1.5.53
ii  libc6  2.19-11
ii  libgcrypt201.6.2-3
ii  libglib2.0-0   2.42.0-2
ii  libpam0g   1.1.8-3.1
ii  libxcb11.10-3
ii  libxdmcp6  1:1.1.1-1
ii  lightdm-gtk-greeter [lightdm-greeter]  1.1.6-2

Versions of packages lightdm recommends:
ii  xserver-xorg  1:7.7+7

Versions of packages lightdm suggests:
pn  accountsservice  
pn  upower   

-- Configuration Files:
/etc/apparmor.d/abstractions/lightdm [Errno 2] No such file or directory: 
u'/etc/apparmor.d/abstractions/lightdm'
/etc/apparmor.d/abstractions/lightdm_chromium-browser [Errno 2] No such file or 
directory: u'/etc/apparmor.d/abstractions/lightdm_chromium-browser'
/etc/apparmor.d/lightdm-guest-session changed:
/usr/lib/i386-linux-gnu/lightdm/lightdm-guest-session-wrapper {
  #include 
  #include 
  #include 
  
  /etc/compizconfig/config rw, # bug in compiz https://launchpad.net/bugs/697678
 
  / r,
  /bin/ rmix,
  /bin/fusermount Px,
  /bin/** rmix,
  /cdrom/ rmix,
  /cdrom/** rmix,
  /dev/ r,
  /dev/** rmw, # audio devices etc.
  owner /dev/shm/** rmw,
  /etc/ r,
  /etc/** rmk,
  /etc/gdm/Xsession ix,
  /lib/ r,
  /lib/** rmixk,
  /lib32/ r,
  /lib32/** rmixk,
  /lib64/ r,
  /lib64/** rmixk,
  owner /media/ r,
  owner /media/** rmwlixk,  # we want access to USB sticks and the like
  /opt/ r,
  /opt/** rmixk,
  @{PROC}/ r,
  @{PROC}/* rm,
  @{PROC}/asound rm,
  @{PROC}/asound/** rm,
  @{PROC}/ati rm,
  @{PROC}/ati/** rm,
  owner @{PROC}/** rm,
  # needed for gnome-keyring-daemon
  @{PROC}/*/status r,
  /sbin/ r,
  /sbin/** rmixk,
  /sys/ r,
  /sys/** rm,
  /tmp/ rw,
  owner /tmp/** rwlkmix,
  /usr/ r,
  /usr/** rmixk,
  /var/ r,
  /var/** rmixk,
  /var/guest-data/** rw, # allow to store files permanently
  /var/tmp/ rw,
  owner /var/tmp/** rwlkm,
  /{,var/}run/ r,
  # necessary for writing to sockets, etc.
  /{,var/}run/** rmkix,
  /{,var/}run/shm/** wl,
  capability ipc_lock,
  # silence warnings for stuff that we really don't want to grant
  deny capability dac_override,
  deny capability dac_read_search,
  #deny /etc/** w, # re-enable once LP#697678 is fixed
  deny /usr/** w,
  deny /var/crash/ w,
}

/etc/lightdm/lightdm.conf changed:
[LightDM]
[SeatDefaults]
xserver-allow-tcp=false
greeter-session=lightdm-greeter
greeter-hide-users=true
greeter-allow-guest=false
greeter-show-remote-login=false
allow-guest=false
greeter-setup-script=/etc/lightdm/greeter_res_setup
[XDMCPServer]
[VNCServer]

/etc/pam.d/lightdm changed:
auth  requisite pam_nologin.so
auth  required pam_env.so envfile=/etc/default/locale
@include common-auth
@include common-account
session  [success=ok ignore=ignore module_unknown=ignore default=bad] 
pam_selinux.so close
session  requiredpam_limits.so
session  requiredpam_loginuid.so
@include common-session
session [success=ok ignore=ignore module_unknown=ignore default=bad] 
pam_selinux.so open
@include common-password

/etc/pam.d/lightdm-greeter changed:
auth  required pam_env.so envfile=/etc/default/locale
auth  required pam_permit.so
account   required pam_permit.so
password  required pam_deny.so
session   required pam_unix.so


-- debconf information:
  lightdm/daemon_name: /usr/sbin/lightdm
* shared/default-x-display-manager: lightdm

-- debsums errors found:
sh: 1: /usr/sbin/dpkg-divert: not found


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Bug#762211: lightdm crashes on startup, system falls back to console

2014-10-09 Thread Pat Parson
Package: liblightdm-gobject-1-0
Version: 1.10.2-2
Followup-For: Bug #762211

Dear Maintainer,

Updating liblightdm-gobject-1-0 to testing version produces this problem on my 
machine. 
Downgrading the library to stable corrects the problem.

-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (993, 'testing'), (993, 'stable'), (992, 'proposed-updates'), 
(991, 'stable-updates'), (550, 'testing'), (550, 'stable')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-4-686-pae (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages liblightdm-gobject-1-0 depends on:
ii  libc6  2.19-11
ii  libglib2.0-0   2.42.0-2
ii  libx11-6   2:1.6.2-3
ii  libxklavier16  5.2.1-1
ii  multiarch-support  2.13-38+deb7u4

liblightdm-gobject-1-0 recommends no packages.

liblightdm-gobject-1-0 suggests no packages.

-- no debconf information

-- debsums errors found:
sh: 1: /usr/sbin/dpkg-divert: not found


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Bug#762211: [Pkg-xfce-devel] Bug#762211: lightdm crashes on startup, system falls back to console

2014-10-08 Thread Yves-Alexis Perez
control: forwarded -1 https://bugs.launchpad.net/lightdm/+bug/1378994
On Wed, Oct 08, 2014 at 10:36:41AM +0400, Vlad Orlov wrote:
> Hi,
> 
> I confirm this. Thanks for the hint about erasing some parameters from
> the config file. I was able to fix lightdm by commenting these lines in
> /etc/lightdm/lightdm.conf:

I just took the time to forward that upstream at
https://bugs.launchpad.net/lightdm/+bug/1378994

Regards,
-- 
Yves-Alexis


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Bug#762211: lightdm crashes on startup, system falls back to console

2014-10-07 Thread Vlad Orlov
Hi,

I confirm this. Thanks for the hint about erasing some parameters from
the config file. I was able to fix lightdm by commenting these lines in
/etc/lightdm/lightdm.conf:

greeter-session=lightdm-greeter
session-wrapper=/etc/X11/Xsession

Bug#762211: [Pkg-xfce-devel] Bug#762211: lightdm crashes on startup, system falls back to console

2014-10-05 Thread Patrick Häcker
> > The problematic line in my setup is
> > > greeter-session=lightdm-kde-greeter
> 
> This one has been manually added. You're basically saying lightdm the
> greeter is lightdm-kde-greeter. If you don't have it installed, then it
> obviously can't start it, so it might be worth double checking that.

Sorry for not being precise. I had and still have it installed:
> dpkg -l | grep ' lightdm'
> ii  lightdm  1.10.2-2   amd64   simple display manager
> ii  lightdm-kde-greeter  0.3.2.2-1  amd64   LightDM KDE greeter

But instead of being used, that line produces the following error (with 
varying memory address) crashing lightdm:
> *** Error in `/usr/sbin/lightdm': double free or corruption (fasttop): 
0x7ff6ca2175f0 ***

> > As Fabio Rosciano has the line
> > > greeter-session=lightdm-greeter
> > in his config, too, this is very likely the culprit.
> 
> lightdm-greeter is the correct setting, lightdm-greeter is managed using
> the alternatives system, so if you remove a greeter the system will
> switch to another greeter automatically.

Yes, but I guess that as soon as the key "greeter-session" appears in the 
config file, lightdm 1.10.2-2 crashes. It definitely does it on my computer 
with the value "lightdm-kde-greeter". I haven't checked other values, but I 
can do that if you tell me which values I should check.

> Yup, greeter-hide-users was previously set (to true)
> in /e/l/lightdm.conf, and is now set
> in /usr/share/lightdm/lightdm.conf.d/01_debian.conf.
> 
> So, can you actually check which one is actually making lightdm crash?

The former one lets lightdm crash. "greeter-hide-users" does not seem to have 
anything to do with the crash. I just wanted to mention it, as the 
configuration with both keys set seems to be quite common, which is why this 
crash should be fixed without the need that everyone removes the "greeter 
session" key from his config.

Kind regards
Patrick

P. S. If you can't reproduce it: Both Fabio Rosciano have an amd64 system. It 
might be different on an i386 system.

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Bug#762211: [Pkg-xfce-devel] Bug#762211: lightdm crashes on startup, system falls back to console

2014-10-05 Thread Yves-Alexis Perez
On sam., 2014-10-04 at 15:36 +0200, Patrick Häcker wrote:
> On Sun, 28 Sep 2014 21:43:08 +0200 Yves-Alexis Perez  
> wrote:
> > > sorry for the delayed reply. I could indeed confirm that the problem is
> > > in the config file. Keeping the old config files breaks the upgrade,
> > > while installing the new ones has no problem.
> > > Here is the offending lightdm.conf:
> > > 
> > > http://pastebin.com/RmcGJiNj
> > 
> > A quick look doesn't reveal anything offending, but now that you
> > identified the cause you can “bisect” to find the offending line, I
> > guess.
> 
> I did exactly that, as I have been bitten by that bug, too. The problematic 
> line in my setup is
> > greeter-session=lightdm-kde-greeter

This one has been manually added. You're basically saying lightdm the
greeter is lightdm-kde-greeter. If you don't have it installed, then it
obviously can't start it, so it might be worth double checking that.

> If it is active, lightdm fails to start, if it is commented, lightdm works. 
> In 
> the package's current config file, this line does not exist.
> 
> As Fabio Rosciano has the line
> > greeter-session=lightdm-greeter
> in his config, too, this is very likely the culprit.

lightdm-greeter is the correct setting, lightdm-greeter is managed using
the alternatives system, so if you remove a greeter the system will
switch to another greeter automatically.

> 
> The next line
> > greeter-hide-users=false
> is at the same place and active both in our conf files. Thus I think these 
> lines have been created automatically, shipped by an older version or came 
> from some tutorial. Therefore it's important, that lightdm can cope with this 
> line without crashing, as this will hit more users and some users won't have 
> the skill needed to remove a line in a config file when upgrading to Jessie.

Yup, greeter-hide-users was previously set (to true)
in /e/l/lightdm.conf, and is now set
in /usr/share/lightdm/lightdm.conf.d/01_debian.conf.

So, can you actually check which one is actually making lightdm crash?
-- 
Yves-Alexis


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Bug#762211: lightdm crashes on startup, system falls back to console

2014-10-04 Thread Scott Barker
I had this same problem, and while digging around for the cause, I found the
file /usr/share/lightdm/lightdm.conf.d/01_debian.conf. If I try to set any
of the options listed in that file in /etc/lightdm/lightdm.conf, lightdm
crashes. Perhaps lightdm cannot handle an option being set twice?

-- 
Scott Barker


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Bug#762211: lightdm crashes on startup, system falls back to console

2014-10-04 Thread Patrick Häcker
On Sun, 28 Sep 2014 21:43:08 +0200 Yves-Alexis Perez  
wrote:
> > sorry for the delayed reply. I could indeed confirm that the problem is
> > in the config file. Keeping the old config files breaks the upgrade,
> > while installing the new ones has no problem.
> > Here is the offending lightdm.conf:
> > 
> > http://pastebin.com/RmcGJiNj
> 
> A quick look doesn't reveal anything offending, but now that you
> identified the cause you can “bisect” to find the offending line, I
> guess.

I did exactly that, as I have been bitten by that bug, too. The problematic 
line in my setup is
> greeter-session=lightdm-kde-greeter
If it is active, lightdm fails to start, if it is commented, lightdm works. In 
the package's current config file, this line does not exist.

As Fabio Rosciano has the line
> greeter-session=lightdm-greeter
in his config, too, this is very likely the culprit.

The next line
> greeter-hide-users=false
is at the same place and active both in our conf files. Thus I think these 
lines have been created automatically, shipped by an older version or came 
from some tutorial. Therefore it's important, that lightdm can cope with this 
line without crashing, as this will hit more users and some users won't have 
the skill needed to remove a line in a config file when upgrading to Jessie.

Kind regards
Patrick

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Bug#762211: [Pkg-xfce-devel] Bug#762211: Bug#762211: lightdm crashes on startup, system falls back to console

2014-09-28 Thread Yves-Alexis Perez
On dim., 2014-09-28 at 09:38 +0200, Fabio Rosciano wrote:
> On Sat, 27 Sep 2014 19:05:51 -0400 Michael Gilbert
>  wrote:
> > A recent version of the package updates /etc/lightdm/lightdm.conf, but
> > if the user elects to not use the new maintainer conffile, this
> > problem will occur.
> 
> Dear all, 
> 
> sorry for the delayed reply. I could indeed confirm that the problem is
> in the config file. Keeping the old config files breaks the upgrade,
> while installing the new ones has no problem.
> Here is the offending lightdm.conf:
> 
> http://pastebin.com/RmcGJiNj

A quick look doesn't reveal anything offending, but now that you
identified the cause you can “bisect” to find the offending line, I
guess.

Regards,
-- 
Yves-Alexis


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Bug#762211: [Pkg-xfce-devel] Bug#762211: lightdm crashes on startup, system falls back to console

2014-09-28 Thread Gour
On Sat, 27 Sep 2014 19:05:51 -0400 Michael Gilbert
 wrote:

> A recent version of the package updates /etc/lightdm/lightdm.conf, but
> if the user elects to not use the new maintainer conffile, this
> problem will occur.

Confirmed...installing new conf file file and manually merging with the
old one works.


Sincerely,
Gour


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Bug#762211: [Pkg-xfce-devel] Bug#762211: lightdm crashes on startup, system falls back to console

2014-09-28 Thread Fabio Rosciano
On Sat, 27 Sep 2014 19:05:51 -0400 Michael Gilbert
 wrote:
> A recent version of the package updates /etc/lightdm/lightdm.conf, but
> if the user elects to not use the new maintainer conffile, this
> problem will occur.

Dear all, 

sorry for the delayed reply. I could indeed confirm that the problem is
in the config file. Keeping the old config files breaks the upgrade,
while installing the new ones has no problem.
Here is the offending lightdm.conf:

http://pastebin.com/RmcGJiNj

And this is lightdm-gtk-greeter.conf

http://pastebin.com/iV3bsLpw

I hope this helps.


-- 
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-- C. Schulz


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Bug#762211: [Pkg-xfce-devel] Bug#762211: lightdm crashes on startup, system falls back to console

2014-09-27 Thread Michael Gilbert
control: tag -1 -unreproducible

A recent version of the package updates /etc/lightdm/lightdm.conf, but
if the user elects to not use the new maintainer conffile, this
problem will occur.

Best wishes,
Mike


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Bug#762211: [Pkg-xfce-devel] Bug#762211: Bug#762211: Bug#762211: lightdm crashes on startup, system falls back to console

2014-09-25 Thread Yves-Alexis Perez
control: tag -1 unreproducible moreinfo
On jeu., 2014-09-25 at 19:32 +0200, Gour wrote:
> On Thu, 25 Sep 2014 17:12:47 +0200
> Yves-Alexis Perez  wrote:
> 
> > Try dist-upgrade, you might be missing some upgrades…
> 
> dist-upgrade wants to upgrade some other buggy pkgs which might be
> critical for other applications like NM & dhcp.
> 
> Will resume work on this on Sunday, no time for it before.
> 
> 
Well, do as you can, there's no hurry. Just remember this is not a
support channel but a bug tracking system.

Regards,
-- 
Yves-Alexis


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Bug#762211: [Pkg-xfce-devel] Bug#762211: Bug#762211: lightdm crashes on startup, system falls back to console

2014-09-25 Thread Gour
On Thu, 25 Sep 2014 17:12:47 +0200
Yves-Alexis Perez  wrote:

> Try dist-upgrade, you might be missing some upgrades…

dist-upgrade wants to upgrade some other buggy pkgs which might be
critical for other applications like NM & dhcp.

Will resume work on this on Sunday, no time for it before.


Sincerely,
Gour


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Bug#762211: [Pkg-xfce-devel] Bug#762211: Bug#762211: lightdm crashes on startup, system falls back to console

2014-09-25 Thread Yves-Alexis Perez
On jeu., 2014-09-25 at 15:47 +0200, Gour wrote:
> Same problem here which appeared after I did: apt-get upgrade today...

Try dist-upgrade, you might be missing some upgrades…
> 
> $ dpkg -l |grep lightdm
> ii  liblightdm-gobject-1-0  1.10.2-1  
> amd64simple display manager (gobject library)
> ii  lightdm 1.10.2-1  
> amd64simple display manager
> ii  lightdm-gtk-greeter 1.8.5-1   
> amd64simple display manager (GTK+ greeter)
> 
> Downgrading helps, but re-upgrading does not.

Ok. Anything in the logs?
-- 
Yves-Alexis


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Bug#762211: [Pkg-xfce-devel] Bug#762211: lightdm crashes on startup, system falls back to console

2014-09-25 Thread Gour
On Wed, 24 Sep 2014 07:26:16 +0200 Yves-Alexis Perez
 wrote:
> On mer., 2014-09-24 at 12:47 +1000, Bryan Cebuliak wrote:
> > Same  problem here. I purged,  installed reliable working kdm,
> > then  I downgraded  to  lightdm 1.10.1 from testing. It   works.
> > Your bleeding user,
> > etc
> > ___
> 
> Can you give us the result of dpkg -l |grep lightdm when fully
> upgraded and it doesn't work?

Same problem here which appeared after I did: apt-get upgrade today...

$ dpkg -l |grep lightdm
ii  liblightdm-gobject-1-0  1.10.2-1
  amd64simple display manager (gobject library)
ii  lightdm 1.10.2-1
  amd64simple display manager
ii  lightdm-gtk-greeter 1.8.5-1 
  amd64simple display manager (GTK+ greeter)

Downgrading helps, but re-upgrading does not.


Sincerely,
Gour


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Bug#762211: [Pkg-xfce-devel] Bug#762211: lightdm crashes on startup, system falls back to console

2014-09-24 Thread Bryan Cebuliak
No. Because now on  reupgrade to 1.10.2 it works.

On 24 September 2014 15:26, Yves-Alexis Perez  wrote:

> On mer., 2014-09-24 at 12:47 +1000, Bryan Cebuliak wrote:
> > Same  problem here. I purged,  installed reliable working kdm,  then  I
> >  downgraded  to  lightdm 1.10.1 from testing. It   works.
> > Your bleeding user,
> > etc
> > ___
>
> Can you give us the result of dpkg -l |grep lightdm when fully upgraded
> and it doesn't work?
>
> Regards,
> --
> Yves-Alexis
>


Bug#762211: [Pkg-xfce-devel] Bug#762211: lightdm crashes on startup, system falls back to console

2014-09-23 Thread Yves-Alexis Perez
On mer., 2014-09-24 at 12:47 +1000, Bryan Cebuliak wrote:
> Same  problem here. I purged,  installed reliable working kdm,  then  I
>  downgraded  to  lightdm 1.10.1 from testing. It   works.
> Your bleeding user,
> etc
> ___

Can you give us the result of dpkg -l |grep lightdm when fully upgraded
and it doesn't work?

Regards,
-- 
Yves-Alexis


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Bug#762211: lightdm crashes on startup, system falls back to console

2014-09-23 Thread Bryan Cebuliak
Same  problem here. I purged,  installed reliable working kdm,  then  I
 downgraded  to  lightdm 1.10.1 from testing. It   works.
Your bleeding user,
etc


Bug#762211: [Pkg-xfce-devel] Bug#762211: lightdm crashes on startup, system falls back to console

2014-09-21 Thread Yves-Alexis Perez
control: severity -1 important
control: tag -1 moreinfo unreproducible

On ven., 2014-09-19 at 16:37 +0200, Fabio Rosciano wrote:
> Package: lightdm
> Version: 1.10.2-1
> Severity: critical
> Justification: breaks the whole system
> 
> Hello,
> 
> I cannot start lightdm on my system with Intel graphics since yesterday's
> upgrade from 1.10.1-3 to 1.10.2-1.
> The service fails with:
> 
> root@nostromo:~# systemctl start lightdm
> Job for lightdm.service failed. See 'systemctl status lightdm.service' and
> 'journalctl -xn' for details.
> root@nostromo:~# systemctl status lightdm.service
> ● lightdm.service - Light Display Manager
>Loaded: loaded (/lib/systemd/system/lightdm.service; enabled)
>Active: failed (Result: start-limit) since Fri 2014-09-19 16:31:21 CEST;
> 1s ago
>  Docs: man:lightdm(1)
>   Process: 4253 ExecStartPre=/bin/sh -c [ "$(cat
> /etc/X11/default-display-manager 2>/dev/null)" = "/usr/sbin/lightdm" ]
> (code=exited, status=1/FAILURE)
> 
> Sep 19 16:31:21 nostromo systemd[1]: Unit lightdm.service entered failed
> state.
> Sep 19 16:31:21 nostromo systemd[1]: lightdm.service start request repeated
> too quickly, refusing to start.
> Sep 19 16:31:21 nostromo systemd[1]: Failed to start Light Display Manager.
> Sep 19 16:31:21 nostromo systemd[1]: Unit lightdm.service entered failed
> state.

Can you try with invoke-rc.d lightdm restart ?
> 
> And invoking lightdm directly yields:
> 
> root@nostromo:~# lightdm
> *** Error in `lightdm': double free or corruption (fasttop):
> *** 0x7f51a9ea1850 ***
> Aborted

Does it happen when downgrading to 1.10.1?
-- 
Yves-Alexis


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Bug#762211: lightdm crashes on startup, system falls back to console

2014-09-19 Thread Fabio Rosciano
Package: lightdm
Version: 1.10.2-1
Severity: critical
Justification: breaks the whole system

Hello,

I cannot start lightdm on my system with Intel graphics since yesterday's
upgrade from 1.10.1-3 to 1.10.2-1.
The service fails with:

root@nostromo:~# systemctl start lightdm
Job for lightdm.service failed. See 'systemctl status lightdm.service' and
'journalctl -xn' for details.
root@nostromo:~# systemctl status lightdm.service
● lightdm.service - Light Display Manager
   Loaded: loaded (/lib/systemd/system/lightdm.service; enabled)
   Active: failed (Result: start-limit) since Fri 2014-09-19 16:31:21 CEST;
1s ago
 Docs: man:lightdm(1)
  Process: 4253 ExecStartPre=/bin/sh -c [ "$(cat
/etc/X11/default-display-manager 2>/dev/null)" = "/usr/sbin/lightdm" ]
(code=exited, status=1/FAILURE)

Sep 19 16:31:21 nostromo systemd[1]: Unit lightdm.service entered failed
state.
Sep 19 16:31:21 nostromo systemd[1]: lightdm.service start request repeated
too quickly, refusing to start.
Sep 19 16:31:21 nostromo systemd[1]: Failed to start Light Display Manager.
Sep 19 16:31:21 nostromo systemd[1]: Unit lightdm.service entered failed
state.

And invoking lightdm directly yields:

root@nostromo:~# lightdm
*** Error in `lightdm': double free or corruption (fasttop):
*** 0x7f51a9ea1850 ***
Aborted

Please let me know how can I help debugging.
I have installed xdm as a workaround and the system boots and works fine.
Thank you!




-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages lightdm depends on:
ii  adduser3.113+nmu3
ii  consolekit 0.4.6-5
ii  dbus   1.8.8-1
ii  debconf [debconf-2.0]  1.5.53
ii  libc6  2.19-11
ii  libgcrypt111.5.4-3
ii  libglib2.0-0   2.40.0-5
ii  libpam-systemd 215-4
ii  libpam0g   1.1.8-3.1
ii  libxcb11.10-3
ii  libxdmcp6  1:1.1.1-1
ii  lightdm-gtk-greeter [lightdm-greeter]  1.8.5-1

Versions of packages lightdm recommends:
ii  xserver-xorg  1:7.7+7

Versions of packages lightdm suggests:
ii  accountsservice  0.6.37-3
ii  upower   0.99.1-3

-- Configuration Files:
/etc/lightdm/lightdm.conf changed:
[LightDM]
[SeatDefaults]
xserver-allow-tcp=false
greeter-session=lightdm-greeter
greeter-hide-users=false
session-wrapper=/etc/X11/Xsession
[XDMCPServer]
[VNCServer]


-- debconf information:
  lightdm/daemon_name: /usr/sbin/lightdm
* shared/default-x-display-manager: xdm


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