archlinux - dummyqbs_drv.so not loading (undefined symbol: fbScreenInit)

[ptitdoc]

Qubes OS version (e.g., R3.2):

R3.2

Affected TemplateVMs (e.g., fedora-23, if applicable):

archlinux

---

Expected behavior:

xorg starts properly and the GUI agent works properly.

Actual behavior:

the AppVM starts properly with qrexec working, the systemd qubes gui daemon starts properly, but no GUI application can be started.

Steps to reproduce the behavior:

Install qubes-vm-gui-3.2.17-7-x86_64.pkg.tar.xz in archlinux.

General notes:

• /home/user/.xsession-errors shows Fatal error "no screens found"
• /home/user/.local/share/xorg/Xorg.0.log shows the following message:

[     6.358] (II) LoadModule: "dummyqbs"
[     6.360] (II) Loading /usr/lib/xorg/modules/drivers/dummyqbs_drv.so
[     6.360] (EE) Failed to load /usr/lib/xorg/modules/drivers/dummyqbs_drv.so: /usr/lib/xorg/modules/drivers/dummyqbs_drv.so: undefined symbol: fbScreenInit
[     6.360] (II) UnloadModule: "dummyqbs"
[     6.360] (II) Unloading dummyqbs
[     6.360] (EE) Failed to load module "dummyqbs" (loader failed, 7)
[     6.360] (II) LoadModule: "qubes"
[     6.360] (II) Loading /usr/lib/xorg/modules/drivers/qubes_drv.so

---

Related issues:

[ptitdoc]

This can be fixed by forcing Xorg to load libfb.
For instance, by adding the following to the beginning of the file /etc/X11/xorg-qubes.conf.template:

Section "Module"
  Load "libfb.so"
EndSection

However, I have no hints why Xorg stopped loading this module automatically.

[ptitdoc]

This can be fixed by forcing Xorg to load libfb.
For instance, by adding the following to the beginning of the file /etc/X11/xorg-qubes.conf.template:

Section "Module"
  Load "libfb.so"
EndSection

However, I have no hints why Xorg stopped loading this module automatically.

[ptitdoc]

If I check on a system before updating, in Xorg logs, libfb.so is loaded after dummyqbs_drv.so however if I check the .so file (nm -C libfb.so), libfb exports fbScreenInit.

If I check on a system after the update, in Xorg logs, dummyqbs_drv.so is loaded immediatly after glx and fail to load because of undefined symbol: fbScreenInit. If I check nm -C libfb.so, it exports fbScreenInit.

[ptitdoc]

If I check on a system before updating, in Xorg logs, libfb.so is loaded after dummyqbs_drv.so however if I check the .so file (nm -C libfb.so), libfb exports fbScreenInit.

If I check on a system after the update, in Xorg logs, dummyqbs_drv.so is loaded immediatly after glx and fail to load because of undefined symbol: fbScreenInit. If I check nm -C libfb.so, it exports fbScreenInit.

[ptitdoc]

Do anyone see problems enforcing libfb.so loading into xorg-qubes.conf.template ? This could fix future issues with other OSes... or not...

[ptitdoc]

Do anyone see problems enforcing libfb.so loading into xorg-qubes.conf.template ? This could fix future issues with other OSes... or not...

[marmarek]

Since we don't have diverse X configurations to support there, loading libfb.so explicitly is ok.
I assume, you've already tried rebuilding gui-agent (with current Xorg headers and libs), right?

[marmarek]

Since we don't have diverse X configurations to support there, loading libfb.so explicitly is ok.
I assume, you've already tried rebuilding gui-agent (with current Xorg headers and libs), right?

[ptitdoc]

I tried to build the gui-agent twice, using the qubes builder. Additionnally, I think that loading a module built with an old Xorg server version in a new Xorg server will raise version mismatch errors (there is however an option in xorg config to accept version mismatch errors).

Anyway, I checked during 1 hour without finding the potential cause. This also could be an Xorg driver loader bug.

One strange thing however is that before this bug, the modules where loaded in the wrong order, without raising any undefined symbol errors.

[ptitdoc]

I tried to build the gui-agent twice, using the qubes builder. Additionnally, I think that loading a module built with an old Xorg server version in a new Xorg server will raise version mismatch errors (there is however an option in xorg config to accept version mismatch errors).

Anyway, I checked during 1 hour without finding the potential cause. This also could be an Xorg driver loader bug.

One strange thing however is that before this bug, the modules where loaded in the wrong order, without raising any undefined symbol errors.

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_4.0.4-1+deb8u1 has been pushed to the r4.0 testing repository for the Debian jessie template.
To test this update, first enable the testing repository in /etc/apt/sources.list.d/qubes-*.list by uncommenting the line containing jessie-testing, then use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_4.0.4-1+deb8u1 has been pushed to the r4.0 testing repository for the Debian jessie template.
To test this update, first enable the testing repository in /etc/apt/sources.list.d/qubes-*.list by uncommenting the line containing jessie-testing, then use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_4.0.4-1+deb9u1 has been pushed to the r4.0 testing repository for the Debian stretch template.
To test this update, first enable the testing repository in /etc/apt/sources.list.d/qubes-*.list by uncommenting the line containing stretch-testing, then use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_4.0.4-1+deb9u1 has been pushed to the r4.0 testing repository for the Debian stretch template.
To test this update, first enable the testing repository in /etc/apt/sources.list.d/qubes-*.list by uncommenting the line containing stretch-testing, then use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package pulseaudio-qubes-4.0.4-1.fc24 has been pushed to the r4.0 testing repository for the Fedora fc24 template.
To test this update, please install it with the following command:

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Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package pulseaudio-qubes-4.0.4-1.fc24 has been pushed to the r4.0 testing repository for the Fedora fc24 template.
To test this update, please install it with the following command:

sudo yum update --enablerepo=qubes-vm-r4.0-current-testing

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package pulseaudio-qubes-4.0.4-1.fc25 has been pushed to the r4.0 testing repository for the Fedora fc25 template.
To test this update, please install it with the following command:

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Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package pulseaudio-qubes-4.0.4-1.fc25 has been pushed to the r4.0 testing repository for the Fedora fc25 template.
To test this update, please install it with the following command:

sudo yum update --enablerepo=qubes-vm-r4.0-current-testing

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_3.2.18-1+deb8u1 has been pushed to the r3.2 testing repository for the Debian jessie template.
To test this update, first enable the testing repository in /etc/apt/sources.list.d/qubes-*.list by uncommenting the line containing jessie-testing, then use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_3.2.18-1+deb8u1 has been pushed to the r3.2 testing repository for the Debian jessie template.
To test this update, first enable the testing repository in /etc/apt/sources.list.d/qubes-*.list by uncommenting the line containing jessie-testing, then use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_3.2.18-1+deb9u1 has been pushed to the r3.2 testing repository for the Debian stretch template.
To test this update, first enable the testing repository in /etc/apt/sources.list.d/qubes-*.list by uncommenting the line containing stretch-testing, then use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_3.2.18-1+deb9u1 has been pushed to the r3.2 testing repository for the Debian stretch template.
To test this update, first enable the testing repository in /etc/apt/sources.list.d/qubes-*.list by uncommenting the line containing stretch-testing, then use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc23 has been pushed to the r3.2 testing repository for the Fedora fc23 template.
To test this update, please install it with the following command:

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Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc23 has been pushed to the r3.2 testing repository for the Fedora fc23 template.
To test this update, please install it with the following command:

sudo yum update --enablerepo=qubes-vm-r3.2-current-testing

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc24 has been pushed to the r3.2 testing repository for the Fedora fc24 template.
To test this update, please install it with the following command:

sudo yum update --enablerepo=qubes-vm-r3.2-current-testing

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc24 has been pushed to the r3.2 testing repository for the Fedora fc24 template.
To test this update, please install it with the following command:

sudo yum update --enablerepo=qubes-vm-r3.2-current-testing

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc25 has been pushed to the r3.2 testing repository for the Fedora fc25 template.
To test this update, please install it with the following command:

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Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc25 has been pushed to the r3.2 testing repository for the Fedora fc25 template.
To test this update, please install it with the following command:

sudo yum update --enablerepo=qubes-vm-r3.2-current-testing

Changes included in this update

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Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc26 has been pushed to the r3.2 testing repository for the Fedora fc26 template.
To test this update, please install it with the following command:

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Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc26 has been pushed to the r3.2 testing repository for the Fedora fc26 template.
To test this update, please install it with the following command:

sudo yum update --enablerepo=qubes-vm-r3.2-current-testing

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc23 has been pushed to the r3.2 stable repository for the Fedora fc23 template.
To install this update, please use the standard update command:

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Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc23 has been pushed to the r3.2 stable repository for the Fedora fc23 template.
To install this update, please use the standard update command:

sudo yum update

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_3.2.18-1+deb8u1 has been pushed to the r3.2 stable repository for the Debian jessie template.
To install this update, please use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_3.2.18-1+deb8u1 has been pushed to the r3.2 stable repository for the Debian jessie template.
To install this update, please use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc24 has been pushed to the r3.2 stable repository for the Fedora fc24 template.
To install this update, please use the standard update command:

sudo yum update

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc24 has been pushed to the r3.2 stable repository for the Fedora fc24 template.
To install this update, please use the standard update command:

sudo yum update

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_3.2.18-1+deb9u1 has been pushed to the r3.2 stable repository for the Debian stretch template.
To install this update, please use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_3.2.18-1+deb9u1 has been pushed to the r3.2 stable repository for the Debian stretch template.
To install this update, please use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc25 has been pushed to the r3.2 stable repository for the Fedora fc25 template.
To install this update, please use the standard update command:

sudo yum update

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-vm-3.2.18-1.fc25 has been pushed to the r3.2 stable repository for the Fedora fc25 template.
To install this update, please use the standard update command:

sudo yum update

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package pulseaudio-qubes-4.0.5-1.fc24 has been pushed to the r4.0 stable repository for the Fedora fc24 template.
To install this update, please use the standard update command:

sudo yum update

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package pulseaudio-qubes-4.0.5-1.fc24 has been pushed to the r4.0 stable repository for the Fedora fc24 template.
To install this update, please use the standard update command:

sudo yum update

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package pulseaudio-qubes-4.0.5-1.fc25 has been pushed to the r4.0 stable repository for the Fedora fc25 template.
To install this update, please use the standard update command:

sudo yum update

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package pulseaudio-qubes-4.0.5-1.fc25 has been pushed to the r4.0 stable repository for the Fedora fc25 template.
To install this update, please use the standard update command:

sudo yum update

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_4.0.5-1+deb8u1 has been pushed to the r4.0 stable repository for the Debian jessie template.
To install this update, please use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_4.0.5-1+deb8u1 has been pushed to the r4.0 stable repository for the Debian jessie template.
To install this update, please use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_4.0.5-1+deb9u1 has been pushed to the r4.0 stable repository for the Debian stretch template.
To install this update, please use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-gui-agent_4.0.5-1+deb9u1 has been pushed to the r4.0 stable repository for the Debian stretch template.
To install this update, please use the standard update command:

sudo apt-get update && sudo apt-get dist-upgrade

Changes included in this update