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Auteur: Alessandro Selli
Datum:  
Aan: DNG
Onderwerp: [DNG] Thunderbird 1:60.0-3~deb and ApprArmor error "[GFX1-]: Failed to locknew back buffer."
  Hello,

    Today I updated Thunderbird to version 1:60.0-3~deb amd64 from
pkgmaster.devuan.org/merged ascii-security/main.  And I found myself
impacted from this Debian bug concerning AppArmor:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=887973


  I'm just letting you know I could solve it adding this line to the
Thunderbird AppArmor profile, that is to the file
/etc/apparmor.d/usr.bin.thunderbird:

owner /run/shm/org.chromium.* rw,


  I added it right after the line reading:


  owner /dev/shm/org.chromium.* rw, # for Chromium IPC

/dev/shm is a sym-link to /run/shm.

  The fix that is prioposed in Debian bug #887973 did not solve the
issue to me:

> From: Vincas Dargis <vindrg@???>
> To: Carsten Schoenert <c.schoenert@???>
> Cc: 887973@???
> Subject: Re: Bug#887973: thunderbird: Black screen - Failed to lock
> new back buffer
> Date: Mon, 22 Jan 2018 21:02:03 +0200
> Looks like it's enough to add:
>
> /dev/shm/org.chromium.* rw,
>
> To make Thunderbird 58 work again.


  After editing the usr.bin.thunderbird file I also had to run the
following command as root:


apparmor_parser --replace /etc/apparmor.d/usr.bin.thunderbird


  Hope it helps someone else.


--
Alessandro Selli <alessandroselli@???>
Tel. 3701355486
VOIP SIP: dhatarattha@???
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