On Wed, 2022-04-13 at 17:52 -0500, Ranjan Maitra wrote: > Anyway, I have a Dell XPS 13 (9370) circa 2018 and since this > afternoon it has been making screeching sounds, sort of like it is > screeching to a new place, then screeching back, and so on. It has a > SSD (400-AVHW) so what could it be? Since we can't hear it, we can only guess. The obvious things are motorised (fans, and drives), the less obvious ones are whines from switch-mode power supplies (more like loud mosquito noise). Although a laptop has an external mains power supply, there can be high voltage generators for LCD backlights. If the noise changes with screen brightness, I'd suspect the latter. But if the noise changes with differing CPU loads, I'd suspect a cooling fan (there may be more than one). Disc drive noises should be nearly consistent, but will change as the device is being accessed. It's hard to locate some noises, so using a DIY stethoscope is often the easiest way to narrow them down. Just a single piece of flexible pipe in one ear and moving the other end around various parts of the equipment. I've fixed some very hard to trace squealing noises that way several times. Noisy cooling fans may be fixable (if you can get into the bearings), but often it's simplest and best to replace them. Though I know that's hard to do on a laptop. I've a fan somewhere which is all melted, it came from a graphics card. It eventually seized up and then overheated. Since this was a desktop PC, we simply fixed an ordinary PC fan in the case that blew all over the graphics card. It actually did a better cooling job than the original tiny fan that only cooled one bit of a heatsink. -- uname -rsvp Linux 3.10.0-1160.62.1.el7.x86_64 #1 SMP Tue Apr 5 16:57:59 UTC 2022 x86_64 Boilerplate: All unexpected mail to my mailbox is automatically deleted. I will only get to see the messages that are posted to the mailing list. _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
