I have a brand new Ubuntu 20.04 running on my new computer. YouTube videos play without a glitch, but no other audio/video can play. H/W accelerator is off. When I try to install ffmpeg, I end up with a terminal that shows the following. One cannot access the OK to get past this point. 
I'm using a wireless Logitech Keyboard with a Logitech Unifying Receiver plugged into a KVM switch. I created a systemd suspend shortcut to suspend the laptop, a Lenovo IdeaPad. The laptop's lid is always closed. I'm unable to wake the Lenovo from suspend unless I lift the laptop's lid. Once the lid is lifted, the laptop wakes. I want to be able to wake the laptop without having to lift the lid. I'm not sure how to do this.
I tried two things, neither worked. First, I enabled the wakeup file for the Logitech Unifying Receiver (proc/acpi/wakeup). It did indeed wake the laptop when I used the keyboard. The problem was that the laptop woke within about five minutes without any input from me. No activity from the keyboard or anything else. Second, I tried the fix described at How do I get a wireless USB keyboard to to wake Ubuntu 13.10 from suspend? Same problem as the first -- the laptop wakes at unpredictable times, seemingly on its own.
When I look at devices using lsinput, I can see the Logitech keyboard. It's given the physical address usb-0000:00:14.0-3.1.1:1. When I look at proc/acpi/wakeup, I see pci:0000:00:14.0. There is no 3.1.1 extension. If I look at /sys/bus/usb/devices/1-3.1.1, I see it's the Logitech Unifying Receiver.
Here is the result of cat syslog during a wake event:
How do I put all this together to wake with keyboard input, but to suppress other wake events?
It's several days later and I've discovered this -- "Interaction with the Embedded Controller This is where really difficult to diagnose issues occur. The Embedded Controller (EC) contains proprietary code to control peripherals." From https://wiki.ubuntu.com/Kernel/Reference/ACPITricksAndTips
Suffice it to say, this looks pretty difficult and is likely specific to my Lenovo.
I tried the suggestions from other threads and nothing has worked. Chromium shuts down immediately from both launcher and command line. I've removed Chromium thoroughly and reinstalled. Firefox works fine. Tried the following:
sudo apt-get remove chromium --purge
rm -rf ~/.config/chromium
rm -rf ~/.cache/chromium
sudo rm -rf /etc/chromium
I've reinstalled several times using Ubuntu Software Updater.
When I launch from the command line, here is what I get:
chromium-browser --password-store=basic
Received signal 11 SEGV_MAPERR 000000000010
#0 0x7f85710a8425 base::debug::StackTrace::StackTrace()
#1 0x7f85710a880b <unknown>
#2 0x7f85713d3390 <unknown>
#3 0x557a2f3badc8 <unknown>
#4 0x557a2f3bd656 <unknown>
#5 0x557a2f3bddf9 <unknown>
#6 0x557a2f3be143 <unknown>
#7 0x7f8571123821 <unknown>
#8 0x7f85710a9eea base::debug::TaskAnnotator::RunTask()
#9 0x7f85710d2e90 base::MessageLoop::RunTask()
#10 0x7f85710d497d base::MessageLoop::DeferOrRunPendingTask()
#11 0x7f85710d583d <unknown>
#12 0x7f85710d6300 base::MessagePumpLibevent::Run()
#13 0x7f85710d1f15 base::MessageLoop::RunHandler()
#14 0x7f85710fc628 base::RunLoop::Run()
#15 0x7f8571128e36 base::Thread::ThreadMain()
#16 0x7f8571123726 <unknown>
#17 0x7f85713c96ba start_thread
#18 0x7f855aa783dd clone
r8: 000000000000002e r9: 0000557a30e116ec r10: 0000000000000000 r11: 00007f855ab05f50
r12: 00007f84c9ff8ff0 r13: 0000000000000008 r14: 0000000000000008 r15: 00007f84c9ff8eb0
di: 0000000000000000 si: 00007f84c9ff8eb0 bp: 00007f84c9ff8f00 bx: 00007f84c9ff8eb0
dx: 0000000000000065 ax: 0000000000000000 cx: 0000557a33308720 sp: 00007f84c9ff8e60
ip: 0000557a2f3badc8 efl: 0000000000010206 cgf: 0000000000000033 erf: 0000000000000004
trp: 000000000000000e msk: 0000000000000000 cr2: 0000000000000010
[end of stack trace]
Calling _exit(1). Core file will not be generated.
But when I use the Ubuntu Software updater, the application allows me to install a 2nd Chromium, a 3rd Chromium or more. Sometimes the updater sees an existing Chromium and says "Remove" instead of "Install." If I select "Remove," it removes one of the Chromium's, but not all of them. Trying to remove them from the command line does not have an effect:
sudo apt-get remove chromium --purge
[sudo] password for karen:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package 'chromium' is not installed, so not removed
The following packages were automatically installed and are no longer required:
libmircommon5 linux-headers-4.4.0-31 linux-headers-4.4.0-31-generic
linux-headers-4.4.0-62 linux-headers-4.4.0-62-generic linux-headers-4.4.0-63
linux-headers-4.4.0-63-generic linux-headers-4.4.0-64
linux-headers-4.4.0-64-generic linux-headers-4.4.0-66
linux-headers-4.4.0-66-generic linux-headers-4.4.0-70
linux-headers-4.4.0-70-generic linux-headers-4.4.0-71
linux-headers-4.4.0-71-generic linux-headers-4.4.0-72
linux-headers-4.4.0-72-generic linux-headers-4.4.0-75
linux-headers-4.4.0-75-generic linux-headers-4.4.0-78
linux-headers-4.4.0-78-generic linux-image-4.4.0-31-generic
linux-image-4.4.0-62-generic linux-image-4.4.0-63-generic
linux-image-4.4.0-64-generic linux-image-4.4.0-66-generic
linux-image-4.4.0-70-generic linux-image-4.4.0-71-generic
linux-image-4.4.0-72-generic linux-image-4.4.0-75-generic
linux-image-4.4.0-78-generic linux-image-extra-4.4.0-31-generic
linux-image-extra-4.4.0-59-generic linux-image-extra-4.4.0-62-generic
linux-image-extra-4.4.0-63-generic linux-image-extra-4.4.0-64-generic
linux-image-extra-4.4.0-66-generic linux-image-extra-4.4.0-70-generic
linux-image-extra-4.4.0-71-generic linux-image-extra-4.4.0-72-generic
linux-image-extra-4.4.0-75-generic linux-image-extra-4.4.0-78-generic
linux-signed-image-4.4.0-59-generic linux-signed-image-4.4.0-62-generic
linux-signed-image-4.4.0-63-generic linux-signed-image-4.4.0-64-generic
linux-signed-image-4.4.0-66-generic linux-signed-image-4.4.0-70-generic
linux-signed-image-4.4.0-71-generic linux-signed-image-4.4.0-72-generic
linux-signed-image-4.4.0-75-generic linux-signed-image-4.4.0-78-generic
snap-confine torsocks ubuntu-core-launcher
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 8 not upgraded.
Now I have three Chromium Launcher icons that flash Chromium before immediately shutting down.
The results are confusing because on occasion I've been able to use one of the Chromium's to get the Google login. When I login, the Chromium shuts down immediately.
Logging in as guest produces the same results. Also, here is output from fsdk:
sudo fsck -n fsck from util-linux 2.27.1 e2fsck 1.42.13 (17-May-2015)
Warning! /dev/sda8 is mounted. Warning: skipping journal recovery because doing a read-only filesystem check. /dev/sda8: clean, 654869/57204736 files, 7153620/228803072 blocks fsck.fat 3.0.28 (2015-05-16)
0x41: Dirty bit is set. Fs was not properly unmounted and some data may be corrupt. Automatically removing dirty bit. Leaving filesystem unchanged. /dev/sda1: 198 files, 8082/65536 clusters
The only thing that's kept Chromium from folding up is the answer given below to start it with
chromium-browser --disable-extensions
There is an identical post from exactly the same day and one answer was to use chrome instead of chromium. Chrome is working fine and I've removed chromium entirely. I consider this matter closed. Thanks to Alex O. in Chromium crashes as soon as I log in
Disabling sticky edges for left and right sides of the display was easy. I've set that to off. Using CCSM, I set edge stop velocity to 1, but still the edges of Thunderbird and Chromium stick to the top and bottom in Unity. How do you disable that? Thanks in advance.
On what seems like random occasions, after putting my ASUS to sleep, I try to wake it but the Caps Lock is blinking. I have to power my machine down to fix it.
Will post linux-crashdump when I have it. In the meantime, if anyone knows a solution, please let me know.