apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/2038685/+attachment/5707485/+files/WifiSyslog.txt
** Description changed:
This is a follow-up from: https://discourse.ubuntu.com/t/ask-us-
anything-about-ubuntu-kernels/27664/142
Older Ubuntu distributions come with a kernel image that support eBPF
but are not built with a BTF file published (/sys/kernel/btf/vmlinux).
This BTF file is crucial when trying to run eBPF programs that were
built with CO-RE in mind such that a program can be compiled once and
run in any kernel (with some caveats) because the BPF loaders can use
the BTF file to relocate addresses of kernel fields at load time for the
currently running kernel. In the past I've used the debug symbols that
Ubuntu publishes to create BTF files using `pahole` for these older
kernels and then re-using that BTF file for any machine running that
kernel. This is not ideal but I had managed to work around it.
However, on distributions that are under ESM (Ubuntu 16 + Ubuntu 18)
there isn't a debug symbols repository from where to pull the debug
symbols packages to build their respective BTF file and no BTF file is
generated when the kernel is built. This essentially makes these ESM
kernels incompatible with eBPF programs that run using CO-RE (which is
more or less the norm nowadays). Based on my conversation on the
discourse link above it seems like ideally these ESM kernels should be
published with a BTF file.
- P.S. I wasn't able to submit this through `ubuntu-bug linux` as it gave me an
error saying `Problem in linux-image-5.4.0-164-generic This is not an official
Ubuntu package. Please remove any third party package and try again`. I am not
sure why it says that as this is a Ubuntu VM downloaded from the Ubuntu site,
upgraded by doing `pro attach` and then updated to the latest ESM kernel.
- ---
- ProblemType: Bug
- ApportVersion: 2.20.9-0ubuntu7.29
- Architecture: amd64
- AudioDevicesInUse:
- USERPID ACCESS COMMAND
- /dev/snd/controlC0: andres 3050 F pulseaudio
- CurrentDesktop: ubuntu:GNOME
- DistroRelease: Ubuntu 18.04
- InstallationDate: Installed on 2021-05-18 (870 days ago)
- InstallationMedia: Ubuntu 18.04.5 LTS "Bionic Beaver" - Release amd64
(20200806.1)
- Lsusb:
- Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
- Bus 002 Device 004: ID 0e0f:0008 VMware, Inc.
- Bus 002 Device 003: ID 0e0f:0002 VMware, Inc. Virtual USB Hub
- Bus 002 Device 002: ID 0e0f:0003 VMware, Inc. Virtual Mouse
- Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
- MachineType: VMware, Inc. VMware Virtual Platform
- Package: linux (not installed)
- ProcEnviron:
- TERM=xterm-256color
- PATH=(custom, no user)
- XDG_RUNTIME_DIR=
- LANG=en_US.UTF-8
- SHELL=/bin/bash
- ProcFB: 0 svgadrmfb
- ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-164-generic
root=UUID=c6dbf1d0-3a95-4d98-a0f8-fdea28a5ffc9 ro find_preseed=/preseed.cfg
auto noprompt priority=critical locale=en_US quiet
- ProcVersionSignature: Ubuntu 5.4.0-164.181~18.04.1-generic 5.4.248
- RelatedPackageVersions:
- linux-restricted-modules-5.4.0-164-generic N/A
- linux-backports-modules-5.4.0-164-generic N/A
- linux-firmware 1.173.21
- RfKill:
- 0: hci0: Bluetooth
- Soft blocked: no
- Hard blocked: no
- Tags: bionic
- Uname: Linux 5.4.0-164-generic x86_64
- UpgradeStatus: No upgrade log present (probably fresh install)
- UserGroups: adm cdrom dip docker kvm libvirt lpadmin plugdev sambashare sudo
- _MarkForUpload: True
- dmi.bios.date: 11/12/2020
- dmi.bios.vendor: Phoenix Technologies LTD
- dmi.bios.version: 6.00
- dmi.board.name: 440BX Desktop Reference Platform
- dmi.board.vendor: Intel Corporation
- dmi.board.version: None
- dmi.chassis.asset.tag: No Asset Tag
- dmi.chassis.type: 1
- dmi.chassis.vendor: No Enclosure
- dmi.chassis.version: N/A
- dmi.modalias:
dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd11/12/2020:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
- dmi.product.name: VMware Virtual Platform
- dmi.product.version: None
- dmi.sys.vendor: VMware, Inc.
- ---
+ P.S. I wasn't able to submit this through `ubuntu-bug linux` as it gave
+ me an error saying `Problem in linux-image-4.15.0-218-generic This is
+ not an official Ubuntu package. Please remove any third party package
+ and try again`. I am not sure why it says that as this is a Ubuntu VM
+ downloaded from the Ubuntu site, upgraded by doing `pro attach` and then
+ updated to the latest ESM kernel.
+
+ ---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.29
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211
not found.
CurrentDesktop: ubuntu:GNOME