On my fully updated Ubuntu 18.04.3 system, audio doesn't work unless I switch between outputs. When I boot my PC, the right output (stereo speakers) is already selected by default, but there is no audio from Chromium, Firefox, VLC or any other program. However, the GNOME speakers test works. I can hear "front left" and "front right" from there, but no audio from other programs. In order to fix that, I can simply switch to another audio output (e.g. HDMI out) and then switch back to the stereo speakers, and the audio will magically work. Any idea why? It's not a big deal because it takes a couple of seconds to switch between outputs, but it's kind of annoying to do that after every reboot.
I'm using Ubuntu Server 18.04. If I run:
dpkg --list | grep linux-image
It says I have the following kernels:
rc linux-image-4.15.0-20-generic 4.15.0-20.21
rc linux-image-4.15.0-22-generic 4.15.0-22.24
rc linux-image-4.15.0-23-generic 4.15.0-23.25
ii linux-image-4.15.0-24-generic 4.15.0-24.26
rc linux-image-4.15.0-29-generic 4.15.0-29.31
However, if I check the current kernel version with:
uname -r
It says I'm using:
4.15.0-24-generic
So, how do I update the kernel to 4.15.0-29? I've tried:
sudo apt update && sudo apt dist-upgrade -y
But it says there are no updates available.
I'm using Ubuntu Server 18.04. Today I ran the usual apt upgrade and got the following error:
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
linux-image-4.15.0-23-generic : Depends: linux-modules-4.15.0-23-generic but it is not going to be installed
Recommends: grub-pc or
grub-efi-amd64 or
grub-efi-ia32 or
grub but it is not installable or
lilo but it is not going to be installed
E: Broken packages
So I tried to reinstall grub, but it won't let me:
Could not find /boot/grub/menu.lst file. Would you like /boot/grub/menu.lst generated for you? (y/N) /usr/sbin/update-grub-legacy-ec2: line 1101: read: read error: 0: Bad file descriptor
run-parts: /etc/kernel/postrm.d/x-grub-legacy-ec2 exited with return code 1
dpkg: error processing package linux-image-4.15.0-23-generic (--remove):
installed linux-image-4.15.0-23-generic package post-removal script subprocess returned error exit status 1
Removing linux-image-4.15.0-29-generic (4.15.0-29.31) …
/etc/kernel/postrm.d/initramfs-tools:
update-initramfs: Deleting /boot/initrd.img-4.15.0-29-generic
/etc/kernel/postrm.d/x-grub-legacy-ec2:
Searching for GRUB installation directory … found: /boot/grub
Searching for default file … found: /boot/grub/default
Testing for an existing GRUB menu.lst file …
Could not find /boot/grub/menu.lst file. Would you like /boot/grub/menu.lst generated for you? (y/N) /usr/sbin/update-grub-legacy-ec2: line 1101: read: read error: 0: Bad file descriptor
run-parts: /etc/kernel/postrm.d/x-grub-legacy-ec2 exited with return code 1
dpkg: error processing package linux-image-4.15.0-29-generic (--remove):
installed linux-image-4.15.0-29-generic package post-removal script subprocess returned error exit status 1
Errors were encountered while processing:
linux-image-4.15.0-23-generic
linux-image-4.15.0-29-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)
I tried apt autoclean and apt autoremove, but the latter gives me this:
The following packages will be REMOVED:
linux-image-4.15.0-23-generic linux-image-4.15.0-29-generic
0 upgraded, 0 newly installed, 2 to remove and 0 not upgraded.
2 not fully installed or removed.
And then the same error above.
How do I fix that?