我的 Kubuntu 刚刚更新到内核 5.4.0-29，现在没有声音，没有 wifi。使用内核 5.4.0-28 启动 - 一切正常。笔记本电脑华硕 X75VD。
dpkg -l | grep linux
ii binutils-x86-64-linux-gnu 2.34-6ubuntu1 amd64 GNU binary utilities, for x86-64-linux-gnu target
ii console-setup-linux 1.194ubuntu3 all Linux specific part of console-setup
ii libselinux1:amd64 3.0-1build2 amd64 SELinux runtime shared libraries
ii libv4l-0:amd64 1.18.0-2build1 amd64 Collection of video4linux support libraries
ii libv4lconvert0:amd64 1.18.0-2build1 amd64 Video4linux frame format conversion library
ii linux-base 4.5ubuntu3 all Linux image base package
ii linux-firmware 1.187 all Firmware for Linux kernel drivers
ii linux-headers-5.4.0-26 5.4.0-26.30 all Header files related to Linux kernel version 5.4.0
ii linux-headers-5.4.0-26-generic 5.4.0-26.30 amd64 Linux kernel headers for version 5.4.0 on 64 bit x86 SMP
ii linux-headers-5.4.0-28 5.4.0-28.32 all Header files related to Linux kernel version 5.4.0
ii linux-headers-5.4.0-28-generic 5.4.0-28.32 amd64 Linux kernel headers for version 5.4.0 on 64 bit x86 SMP
ii linux-headers-5.4.0-29 5.4.0-29.33 all Header files related to Linux kernel version 5.4.0
ii linux-headers-5.4.0-29-generic 5.4.0-29.33 amd64 Linux kernel headers for version 5.4.0 on 64 bit x86 SMP
ii linux-headers-generic 5.4.0.29.34 amd64 Generic Linux kernel headers
ii linux-image-5.4.0-26-generic 5.4.0-26.30 amd64 Signed kernel image generic
ii linux-image-5.4.0-28-generic 5.4.0-28.32 amd64 Signed kernel image generic
ii linux-image-generic 5.4.0.28.33 amd64 Generic Linux kernel image
ii linux-image-unsigned-5.4.0-29-generic 5.4.0-29.33 amd64 Linux kernel image for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-5.4.0-26-generic 5.4.0-26.30 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-5.4.0-28-generic 5.4.0-28.32 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-5.4.0-29-generic 5.4.0-29.33 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-extra-5.4.0-26-generic 5.4.0-26.30 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-extra-5.4.0-28-generic 5.4.0-28.32 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-nvidia-390-5.4.0-26-generic 5.4.0-26.30+2 amd64 Linux kernel nvidia modules for version 5.4.0-26
ii linux-modules-nvidia-390-5.4.0-28-generic 5.4.0-28.32 amd64 Linux kernel nvidia modules for version 5.4.0-28
ii linux-modules-nvidia-390-5.4.0-29-generic 5.4.0-29.33 amd64 Linux kernel nvidia modules for version 5.4.0-29
ii linux-modules-nvidia-390-generic-hwe-20.04 5.4.0-29.33 amd64 Extra drivers for nvidia-390 for generic-hwe-20.04
ii linux-sound-base 1.0.25+dfsg-0ubuntu5 all base package for ALSA and OSS sound systems
ii pptp-linux 1.10.0-1build1 amd64 Point-to-Point Tunneling Protocol (PPTP) Client
ii syslinux 3:6.04~git20190206.bf6db5b4+dfsg1-2 amd64 collection of bootloaders (DOS FAT and NTFS bootloader)
ii syslinux-common 3:6.04~git20190206.bf6db5b4+dfsg1-2 all collection of bootloaders (common)
ii syslinux-legacy 2:3.63+dfsg-2ubuntu9 amd64 Bootloader for Linux/i386 using MS-DOS floppies
ii util-linux 2.34-0.1ubuntu9 amd64 miscellaneous system utilities
答案1
由于某种原因，您没有linux-image-5.4.0-29-generic和linux-modules-extra-5.4.0-29-generic。
linux-modules-extra-5.4.0-29-generic包含设备驱动程序。
最有可能的是升级被中断了。
我建议跑步
sudo apt install --reinstall linux-generic
但是 Ubuntu 20.04 的当前内核是5.4.0-28。您只能通过手动安装软件包（不是全部）或启用proposed存储库来获取 5.4.0-29 内核，这是不推荐的并且可能会导致问题。
该proposedrepo 不适用于完整升级。它仅用于测试特定软件包。应将其禁用。
我建议安装synaptic和删除所有5.4.0-29内核包。