373 points by decimalenough 4 days ago | 251 comments
Understanding DNS Resolution on Linux and Kubernetes(jpetazzo.github.io) I recently investigated a warning message on Kubernetes that said: DNSConfigForming ... Nameserver limits were exceeded, some nameservers have been omitted. This was technically a Kubernetes event with type: Warning, and these usually indicate that there’s something wrong, so I wanted to investigate it.
3,200% CPU Utilization(josephmate.github.io) A while back my machine was so messed up that I could barely ssh onto it. 3,200% CPU utilization - all 32 cores on the host were fully utilized! Compare that to my last bug where it only used 1 core, 100%
406 points by surprisetalk 37 days ago | 137 comments
Defragging my old Dell's UEFI NVRAM(artemis.sh) I’m setting up an old Dell box (2011-era tech). I was migrating to some new boot drives and setting up grub on them again. Got to the point of deleting the old boot entries and adding new ones, and got an error like Could not prepare boot variable: No space left on device.
162 points by todsacerdoti 38 days ago | 30 comments
Watt The Fox?(h.43z.one) I recently got a new notebook and noticed that the speakers would occasionally emit a faint but annoying white noise. This issue was only noticeable in a quiet room when no music or other audio was playing through the speakers.
Linux kernel cgroups writeback high CPU troubleshooting(dasl.cc) We’ve been upgrading the operating system from CentOS to Ubuntu on hosts across our fleet. Our CentOS hosts run an outdated Linux kernel version (3.10), whereas our Ubuntu hosts run a more modern kernel version (6.8). In August 2024, we began rolling out the Ubuntu upgrade across our Apache web servers. When we migrated larger portions of our fleet to Ubuntu, we began seeing elevated listen overflow errors.
Showkey: Examine Keyboard Codes(cubiclenate.com) I was having a peculiar issue with my computer where the “]” key kept getting pressed over and over again. It was very aggravating and I wasn’t sure where the problem was coming from. Neither my external keyboard nor the laptop keyboard would respond when I would press the “]” key and I was confused.
Fixing my monitor's power button(lkhrs.com) Turning one of my monitors vertical appeared to exacerbate an issue with the power button to the point where it stopped working. I did my first soldering job in years and was able to get it working again, so I’m documenting it.
96 points by todsacerdoti 67 days ago | 34 comments
Why is my CPU usage always 100%?(downtowndougbrown.com) If you’re new to this series, I’ve been documenting the process I went through upgrading my old PXA166-based Chumby 8’s 2.6.28 Linux kernel to a modern 6.x version.
90 points by Wowfunhappy 143 days ago | 52 comments
The number given as % CPU in Activity Monitor(eclecticlight.co) One of the most frequently quoted measurements in Activity Monitor is % CPU. When the fans blow, or a Mac becomes sluggish, it’s often the first figure to look at and wonder why that process is pulling over 100%.
Intel Core 13th and 14th Gen Desktop Instability Root Cause Update(intel.com) Following extensive investigation of the Intel® Core™ 13th and 14th Gen desktop processor Vmin Shift Instability issue, Intel can now confirm the root cause diagnosis for the issue. This post will cover Intel’s understanding of the root cause, as well as additional mitigations and next steps for Intel® Core™ 13th and 14th Gen desktop users.
Linux Horror Stories and Protection Spells (Volume I) (2021)(blopig.com) Don’t get me wrong. I love Linux. After many years of using it, I ended up appreciating how flexible, potent, and even beautiful it is. However, using Linux has never been a bed of roses and every single Linux user that I know has had to deal with many problems since the very beginning.
37 points by marcodiego 195 days ago | 18 comments
Problems with RPi Pico 2, RPi RP2350 Deepen as Projects Hit by Erratum E9(hackster.io) Raspberry Pi's new RP2350 microcontroller family continues to be the focus of considerable troubleshooting this week, as developers increasingly run into the side-effects of a design flaw known as erratum RP2350-E9 — with the result that some are cancelling designs built around the new chip, at least until a new stepping is released with the fault fixed.
Microwave spontaneously turned on by its LED display(stuffedcow.net) My microwave oven started to malfunction at around five years old. It started to randomly power on the lamp, fan, and turntable. It progressively got worse over several weeks until it was mostly stuck on. The microwave oven is not usable when this happens: It behaves as if the door were open, causing the control panel to ignore button input and to stop cooking if it was cooking.