Owner of Eskimo North

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Joined 2 years ago
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Cake day: August 6th, 2023

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  • @binom If you film with a camera with a ntsc vertical reference rate of 59.95 hz you will see a beat note between the lights and the led lighting indicating it is not well filtered if at all. If you have a newer HiDef camera, most of them work at a 24Hz refresh rate, that IS a slow enough rate that you see jitter in the movement, they also will have a beat note if recording under most LED lights. Many cheap led lights just have a capacitive current limiter and that’s it. If you power them off of 50Hz you will see the flicker, if you get dimmable LED lights they will NOT have a filter. But I don’t want to interfere with anyone’s bragging rights.








  • nanooktoLinux@lemmy.mlSudden emergency
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    fedilink
    512 days ago

    @Rubanski If it’s booting into emergency mode, there are usually one of three issues, kernel is corrupt, a file system can not be mounted read/write, and this can be because of file system corruption or in the case of mdraid, because a raid device failed to self-assemble, or initramfs is broken. The easy way to fix most of these is to use an automated utility called boot repair, you download the ISO then burn to a thumb drive, then when you run into this kind of problem boot off the thumb drive. I’d start by trying to determine which of these it is, if you get into emergency mode then you at least have a shell prompt, try typing dmesg to see if there are any errors relating to the kernel, then check if all of the partitions are mounted and if they are all mounted read/write. If one or more is mounted read only this usually means that the automatic fsck found errors it can not fix and needs a manual run, in which case try fsck -f -y /dev/sdxx or /dev/nvmexnxpx, which ever the case may be (hard drive verses SSD). If this was the issue after the fsck successfully repairs the file system you should be able to boot successfully. If not, and nothing kernel related shows up in dmesg, then probably your initramfs has gotten hurt. In this case since you are new to Linux, boot repair is the easiest way to fix it. You can also fix manually but that is more complex, however if you need instructions on how to do this let me know and I will elaborate. Even doing so manually though requires another bootable Linux media, does not have to be boot repair, a popos install USB will also do.