This bug was fixed in the package kmod - 24-1ubuntu3.4
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kmod (24-1ubuntu3.4) bionic; urgency=medium
* Remove bochs-drm from d/modprobe.d/blacklist-framebuffer.conf
to fix garbled screen with EFI based QEMU/KVM virtual machines
which use VGA=std video devices. (LP:
This bug was fixed in the package linux - 4.15.0-101.102
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linux (4.15.0-101.102) bionic; urgency=medium
* bionic/linux: 4.15.0-101.102 -proposed tracker (LP: #1877262)
* 4.15.0-100.101 breaks userspace builds due to a bug in the headers
/usr/include/linux/swab.h of
I have confirmed that the fix in -proposed fixes the issue for me.
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https://bugs.launchpad.net/bugs/1872863
Title:
QEMU/KVM display is garbled when booting from kernel EFI
I went and looked at the autopkgtest regressions, and they aren't actual
regressions, just transient network problems and slow build timeouts.
chrony autopkgtest regression on armhf:
Need to get 263 kB of archives.
After this operation, 2,048 B of additional disk space will be used.
Err:1
I repeated the same SRU verification as before, this time using kmod
from -proposed.
I installed a fresh Bionic KVM, with EFI enabled. I upgraded the system
to use the latest -updates packages. Linux 4.15.0-99-generic and Kmod
24-1ubuntu3.3 were installed. I shut the machine down, set the VGA
Hello Matthew, or anyone else affected,
Accepted kmod into bionic-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/kmod/24-1ubuntu3.4 in
a few hours, and then in the -proposed repository.
Please help us by testing this new package. See
For both tests I used the kmod package from my test ppa, since it is still
in the unapproved upload queue.
Firstly, I installed 4.15.0-99-generic from -updates, and booted my EFI based
KVM machine with VGA=std. The screen was garbled, as the framebuffer used was
efifb.
I then installed
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag
** Changed in: linux (Ubuntu Bionic)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1872863
Title:
QEMU/KVM display is garbled when booting
** Description changed:
BugLink: https://bugs.launchpad.net/bugs/1872863
[Impact]
A recent grub2 SRU, LP #1864533, now forces the kernel to boot via the
kernel EFI stub whenever EFI is enabled. This causes problems for
QEMU/KVM virtual machines which use the VGA=std video device,
** Description changed:
BugLink: https://bugs.launchpad.net/bugs/1872863
[Impact]
A recent grub2 SRU, LP #1864533, now forces the kernel to boot via the
kernel EFI stub whenever EFI is enabled. This causes problems for
QEMU/KVM virtual machines which use the VGA=std video device,
** Tags added: sts-sponsor-ddstreet
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https://bugs.launchpad.net/bugs/1872863
Title:
QEMU/KVM display is garbled when booting from kernel EFI stub due to
missing
Attached is proof the VM is using VGA=std for the ppc64el test.
** Attachment added: "Proof VM is running VGA=std on ppc64el"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1872863/+attachment/5357796/+files/Screenshot%20from%202020-04-22%2015-14-04.png
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I have verified that enabling the bochs-drm kernel module on bionic does
not cause any regressions for PowerKVM machines when the video device is
VGA=std.
TLDR: See Screenshot:
https://launchpadlibrarian.net/475658598/Screenshot%20from%202020-04-22%2015-14-13.png
This is in response to the main
Attached is screenshot proof that bochs-drm functions correctly on
4.15.0-96-generic ppc64el, and does not cause any regressions when
bochs-drm is enabled on ppc64el.
** Attachment added: "bochs-drm functions correctly on ppc64el"
I rebuilt the kmod and Linux packages to include the ppc64le and powerpc
architectures, so we can test against POWER to ensure that LP #1378648
is no more, and we don't cause any regressions.
I don't have access to any POWER machines though, so I need help
testing.
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Attached is the debdiff for kmod, which removes bochs-drm from the
framebuffer blacklist.
** Patch added: "kmod debdiff for bionic"
https://bugs.launchpad.net/ubuntu/+source/kmod/+bug/1872863/+attachment/5354280/+files/lp1872863_bionic.debdiff
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Submitted Kernel patches to mailing list:
https://lists.ubuntu.com/archives/kernel-team/2020-April/109027.html
https://lists.ubuntu.com/archives/kernel-team/2020-April/109028.html
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** Description changed:
BugLink: https://bugs.launchpad.net/bugs/1872863
[Impact]
A recent grub2 SRU, LP #1864533, now forces the kernel to boot via the
kernel EFI stub whenever EFI is enabled. This causes problems for
QEMU/KVM virtual machines which use the VGA=std video device,
Attached is a picture of the garbled screen when VGA=std under booting
via kernel EFI stub.
** Attachment added: "Garbled screen"
https://bugs.launchpad.net/ubuntu/+source/kmod/+bug/1872863/+attachment/5354248/+files/Screenshot%20from%202020-04-15%2012-19-48.png
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