On Mon, Aug 27, 2018 at 03:38:36PM -0700, Pablo Di Noto wrote:
> Well, I think I found the reason:
> 
> When I updated my debian-9 template, there was a conflict of packages 
> dependencies that made `qubes-gui-agent` become uninstalled. Obviously, with 
> that package missing, any GUI interaction with the VMs depending on that 
> template fails (and qvm-* commands hang forever).
> 
> I fixed the issue by messing with `aptitude` and the "(b) broken packages" 
> option, and then selecting a solution that did this:
> 
> Start-Date: 2018-08-27  18:56:55
> Install: xserver-xorg-video-dummyqbs:amd64 (4.0.15-1+deb9u1, automatic), 
> qubes-gui-agent:amd64 (4.0.15-1+deb9u1)
> Downgrade: xserver-xorg-video-vesa:amd64 (1:2.4.0-1, 1:2.3.4-1+b2), 
> xserver-xorg-video-nouveau:amd64 (1:1.0.15-3, 1:1.0.13-3), 
> xserver-xorg-video-amdgpu:amd64 (18.0.1-1+b1, 1.2.0-1+b1), 
> xserver-xorg-core:amd64 (2:1.20.1-1, 2:1.19.2-1+deb9u2), 
> xserver-xorg-video-fbdev:amd64 (1:0.5.0-1, 1:0.4.4-1+b5), 
> xserver-xorg-video-ati:amd64 (1:18.0.1-2, 1:7.8.0-1+b1), 
> xserver-xorg-video-radeon:amd64 (1:18.0.1-2, 1:7.8.0-1+b1)
> Remove: xserver-xorg-video-dummy:amd64 (1:0.3.8-1+b1), 
> libmagickcore-6.q16-5-extra:amd64 (8:6.9.9.34+dfsg-3+b1), 
> xserver-xorg-video-r128:amd64 (6.11.0-1), libavformat57:amd64 (7:3.4.3-1), 
> xserver-xorg-video-qxl:amd64 (0.1.5-2+b1), libargon2-0:amd64 
> (0~20171227-0.1), xserver-xorg-video-cirrus:amd64 (1:1.5.3-1+b3), 
> linux-headers-4.16.0-2-common:amd64 (4.16.16-2), libmagickwand-6.q16-5:amd64 
> (8:6.9.9.34+dfsg-3+b1), xserver-xorg-video-trident:amd64 (1:1.3.8-1+b1), 
> libxatracker2:amd64 (18.1.6-1), linux-headers-4.16.0-2-amd64:amd64 
> (4.16.16-2), xserver-xorg-video-savage:amd64 (1:2.3.9-2), libpostproc54:amd64 
> (7:3.4.3-1), libgeoclue-2-0:amd64 (2.4.12-1), libstdc++-7-dev:amd64 
> (7.3.0-28), libnfs8:amd64 (1.11.0-2), xserver-xorg-video-mach64:amd64 
> (6.9.6-1), libx264-148:amd64 (2:0.148.2748+git97eaef2-1), libx265-95:amd64 
> (2.1-2+b2), g++-7:amd64 (7.3.0-28), libgfortran4:amd64 (7.3.0-28), 
> xserver-xorg-video-intel:amd64 (2:2.99.917+git20171229-1+b1), 
> xserver-xorg-video-tdfx:amd64 (1:1.4.7-1+b1), xserver-xorg-video-vmware:amd64 
> (1:13.3.0-2), xserver-xorg-video-all:amd64 (1:7.7+19), libswscale4:amd64 
> (7:3.4.3-1), libdns-export1100:amd64 (1:9.11.3+dfsg-2), 
> libmagickcore-6.q16-5:amd64 (8:6.9.9.34+dfsg-3+b1), libgcab-1.0-0:amd64 
> (1.1-3), bdf2psf:amd64 (1.184), xserver-xorg-video-neomagic:amd64 
> (1:1.2.9-1+b3), libva-wayland1:amd64 (1.7.3-2), liblivemedia57:amd64 
> (2016.11.28-1), linux-kbuild-4.16:amd64 (4.16.16-2), libbluray1:amd64 
> (1:0.9.3-3), xserver-xorg-video-mga:amd64 (1:1.6.5-1+b1), 
> libavresample3:amd64 (7:3.4.3-1), xserver-xorg-video-openchrome:amd64 
> (1:0.6.0-3+b1)
> End-Date: 2018-08-27  18:57:05
> 
> After that, it is possible to do
> 
>     systemctl enable qubes-gui-agent.service
>     systemctl start qubes-gui-agent.service
> 
> and from that point on, the template is operating normally.
> 
> Hope it helps!
> ///Pablo

Out of intreset, what was the conflict that led to the package being
uninstalled?

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