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The internal microphone doesn't work on my Dell Inspiron 14 7440 running ubuntu, though it is recognized on windows and I remember it working before I reinstalled the ubuntu system. When I open sound settings, the app doesn't recognize the internal microphone:

I ran alsamixer (newest version) in the terminal and didn't see the internal microphone, this is what it looked like (this screenshot shows all devices listed in alsamixer):

I also looked at pavucontrol and the app shows the internal microphone as "unplugged":

How can I get the microphone working?

Update: I tried plugging in a headset and plugging it out. When I plugged it in 2 microphones showed up, one called "headset microphone" and the other just called "microphone", screenshot:

But when I unplugged the headset both microphones are gone, does it mean that my laptop recognizes its internal microphone when a headset is plugged in? Also when I switch to the one just called "microphone", speaking to the headset microphone doesn't make the bar move as much as patting the laptop, so the "microphone" should be the internal microphone.

I installed the newest ubuntu desktop on dell Inspiron 14 7440, and when I open a video (either mp4 or webm) with GNOME videos it looks like this in the image, showing horizontal bars.

Is this a graphics driver problem? I haven't installed any kind of driver after the ubuntu installation, and if it is a driver problem from where should I install the driver?

I'm planning to buy an Inspiron or XPS model and install Linux on it, and I'd like to run neural networks accelerated by its NPU. Are there available drivers for the NPU in these models that supports debian or ubuntu-based systems?

After installing Mac OS sonoma for a few weeks my mac quickly ran out of storage. I did a scan using cleanmymac and found this huge folder in /Library/Application Support/com.apple.idleassetsd/Customer/:

I opened the folder and found it full of high-quality landscape videos, which is probably used for screen savers. Would anything go wrong if I delete everything in the folder and use the old screen saver?

I downloaded the installer from cmacked.com, and cleanmymac almost immediately recognized it as malware.

Screenshot:

I'm on Mac OS sonoma beta and I've been using the solar gradients wallpaper since it exists. But a few days ago white vertical bars appeared on the wallpaper. When I switched to another wallpaper and switched back the white bars disappear. Yesterday the same issue happened, but when I switch back to the solar gradients wallpaper, the vertical bars are still there. Although any other wallpaper doesn't show vertical bars, I really want the solar gradients wallpaper back, how do I fix this?

Screenshot of wallpaper with vertical bars (the black squares are the dock and documents on my desktop):

I just switched from firefox to librewolf and I imported the autofill passwords through a csv file, but autofill isn't working when I log into websites (the autofill option doesn't show up when I click into "enter password") and I have to manually copy the passwords from about:logins. How do I fix that?

I'm switching from firefox to librewolf on mac, and when I open the "import data" menu on librewolf I can't find the "import from firefox" option. Screenshot above.