I didn't get the above steps to work, so I choose a different way.
I've tried to compile the missing "bochs-drm" module by following these
steps :
apt-get install linux-source-4.18.0
cd /usr/src/linux-source-4.18.0/
tar xjf linux-source-4.18.0.tar.bz2
cd linux-source-4.18.0/
apt-get install bison
apt-get install flex
apt-get install libelf-dev
make oldconfig
make menuconfig
In the menus I searched and enabled the module CONFIG_DRM_BOCHS=m
Then I launched the compilation :
make modules
# Get some coffee
mkdir /lib/modules/4.18.0-12-generic/kernel/drivers/gpu/drm/bochs
cp drivers/gpu/drm/bochs/*.ko
/lib/modules/4.18.0-12-generic/kernel/drivers/gpu/drm/bochs
depmod -a
modprobe bochs-drm
This didn't work and I got the following message in "dmesg" :
bochs_drm: version magic '4.18.17 SMP mod_unload ' should be '4.18.0-12-generic
SMP mod_unload '
But I found a way to change it by editing the main Makefile and changing :
SUBLEVEL = 17
EXTRAVERSION =
To the values :
SUBLEVEL = 0
EXTRAVERSION = -12-generic
Then I restarted a clean compilation :
make clean
make modules
# Get some coffee
cp drivers/gpu/drm/bochs/*.ko
/lib/modules/4.18.0-12-generic/kernel/drivers/gpu/drm/bochs
depmod -a
modprobe bochs-drm
systemctl start sddm
And then I got SDDM back on screen !
I hope bochs-drm will be included in future standard kernel, as asked
for in bug 1795857, because these steps will be necessary after each
update of the standard kernel.
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1802950
Title:
X.org crashes after upgrade to 18.10
Status in xorg-server package in Ubuntu:
Invalid
Bug description:
After the upgrade from 18.04 to 18.10, SDDM fails to start. This happens with
kernel 4.18.0-10 and 4.15.0-36 (it was the chance to discover grub-reboot)
See SDDM crash file attached.
The machine is a virtual machine, and PCI devices use virtio-pci
driver for example.
I looked into /var/log/Xorg.0.log and found many error messages, the first
one being :
(EE) open /dev/dri/card0: No such file or directory
See Xorg log file and crash file attached.
Then I looked at the output of 'lspci -vvnn' and it seems that no kernel
driver manages the VGA Controller.
See output of 'lspci -vvnn' attached
According to the following message, the missing kernel driver may be :
bochs-drm or virtio-vga
https://www.redhat.com/archives/libvir-list/2015-August/msg00220.html
# lsb_release -rd
Description: Ubuntu 18.10
Release: 18.10
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1802950/+subscriptions
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