I don't really know what information I should be reporting about my
hardware. My first guess is that the output of 'lspci -v' relating to
the video device might be useful, so here it is:
00:02.0 VGA compatible controller: Intel Corporation Device 4c8a (rev 04) (prog-
if 00 [VGA controller])
DeviceName: Onboard - Video
Subsystem: ASUSTeK Computer Inc. Device 8694
Flags: bus master, fast devsel, latency 0, IRQ 145
Memory at 6000000000 (64-bit, non-prefetchable) [size=16M]
Memory at 4000000000 (64-bit, prefetchable) [size=256M]
I/O ports at 5000 [size=64]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-signed-oem-5.14 in Ubuntu.
https://bugs.launchpad.net/bugs/1967123
Title:
Hang on boot after 'fb0: switching to inteldrmfb from EFI VGA'
Status in linux-signed-oem-5.14 package in Ubuntu:
New
Bug description:
I'm running Ubuntu 20.04 with HWE kernels. The 5.11 kernel stream has
been working fine for me (and supported the network device on my
reasonably recent PC, which 20.04's default kernel didn't). But the
5.13 and 5.14 kernels all hang on boot.
If I edit the GRUB boot commands to let me see the boot messages, the
hang occurs immediately after printing the message
[ 1.044456] fb0: switching to inteldrmfb from EFI VGA
I can boot this kernel fine if I add 'nomodeset' to the kernel command
line. But then I get unusably low screen resolution. Instead, my
workaround is to manually select a 5.11 kernel from the GRUB menu on
every boot.
I'm not able to provide a full set of kernel messages from a failed
boot attempt, because of course the kernel doesn't boot to a point
where I can save them to a file. But I attach a screenshot of the last
screenful of messages before the hang, in case those are useful. I'll
also attach dmesg logs from a successful boot of the 5.14 kernel with
nomodeset, and from a boot of the 5.11 kernel which gives me full
functionality.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.14.0-1031-oem 5.14.0-1031.34
ProcVersionSignature: Ubuntu 5.11.0-46.51~20.04.1-generic 5.11.22
Uname: Linux 5.11.0-46-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
CasperMD5CheckResult: skip
Date: Wed Mar 30 12:47:47 2022
InstallationDate: Installed on 2013-06-01 (3223 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
SourcePackage: linux-signed-oem-5.14
UpgradeStatus: Upgraded to focal on 2020-08-31 (575 days ago)
modified.conffile..etc.default.apport: [modified]
mtime.conffile..etc.default.apport: 2013-06-02T15:20:08.886312
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