FrameXX

I know this may sound like an over the top useless tinkerink, but I just like to tinker with, play around with stuff and learn, and that may be why I use Linux on my notebook.

I have read some articles about ZRAM and what might be the best configuration and even chatted with some generative models, but didn't come to a decisive conclusion regarding size, compression algorythm etc... I am asking anyone interested to respond about their experience and recommendations given my specs:

OS: Fedora Linux 41 (Workstation Edition) x86_64
CPU: AMD Ryzen 3 7330U (8) @ 4.39 GHz
GPU: Amd Barcelo [Integrated]
Memory: 5.63 GiB (2 GiB is reserved by the GPU)

I use the notebook for school, mainly lightweight programming and using the browser.

I don't expect any magical improvements from the ZRAM as I already use it with the default config, just wanted to learn something new.

I am trying to install Linux (Fedora KDE spin specifically, but this problem is probably not distribution related) on an older Acer Switch 3 (SW312-31P) tablet. The installation always fails when trying to setup grub with "failed to set new efi boot target". Grub shows up when I boot the device, however only UEFI fimware setting is present in the GRUB menu. I repartitioned the whole internal drive as GPT added ext4 partition to be mounted at /, swap partition and FAT32 EFI partition to be mounted at /boot/efi and even told the Fedora installer to reformat it as EFI, however the result is still the same. I think the problem lies somewhere within the EFI firmware of the device itself, because when I run

sudo efibootmgr -v

I get this result:

Skipping unreadable variable "Boot0000": Input/output error
error trace:
 efivarfs.c:271 efivarfs_get_variable(): read failed: Input/output error
 lib.c:140 efi_get_variable(): ops->get_variable failed: Input/output error
Skipping unreadable variable "Boot0001": Input/output error
error trace:
 efivarfs.c:271 efivarfs_get_variable(): read failed: Input/output error
 lib.c:140 efi_get_variable(): ops->get_variable failed: Input/output error
Skipping unreadable variable "Boot0002": Input/output error
error trace:
 efivarfs.c:271 efivarfs_get_variable(): read failed: Input/output error
 lib.c:140 efi_get_variable(): ops->get_variable failed: Input/output error
Skipping unreadable variable "Boot0003": Input/output error
error trace:
 efivarfs.c:271 efivarfs_get_variable(): read failed: Input/output error
 lib.c:140 efi_get_variable(): ops->get_variable failed: Input/output error
Skipping unreadable variable "Boot0005": Input/output error
error trace:
 efivarfs.c:271 efivarfs_get_variable(): read failed: Input/output error
 lib.c:140 efi_get_variable(): ops->get_variable failed: Input/output error
Skipping unreadable variable "Boot2001": Input/output error
error trace:
 efivarfs.c:271 efivarfs_get_variable(): read failed: Input/output error
 lib.c:140 efi_get_variable(): ops->get_variable failed: Input/output error
Skipping unreadable variable "Boot2002": Input/output error
error trace:
 efivarfs.c:271 efivarfs_get_variable(): read failed: Input/output error
 lib.c:140 efi_get_variable(): ops->get_variable failed: Input/output error
Skipping unreadable variable "Boot2003": Input/output error
error trace:
 efivarfs.c:271 efivarfs_get_variable(): read failed: Input/output error
 lib.c:140 efi_get_variable(): ops->get_variable failed: Input/output error
show_order(): Input/output error

Does anyone know what does this mean? I tryed asking Generative AIs, however they would usually advice me to remove faulty entries with some command that wouldn't work (usually using the efivar utility which would at least list all the variables without throwing an error).

I tryed using the "load optimized defaults" option in UEFI settings. That didn't help. I have secure boot disabled.

On start grub prints out "checking media [fail]" before showing boot options.

I know this is probably a primitive topic for most, but I just got into coding in c++ because a simple project I am working on that uses esp8266 which can be programmed using c++. Before this I only had experiemce with python, javascript and typescript.

Now to my problem: I am trying to split my code that is getting longer into multiple files.

I already think that I understand right that each library has a header (.h) file and source (.cpp or .c in case of c) file. The first thing I already have problem with is that as you are defining your functions and classes in the header file and then implementing them in the source file you are repeating yourself with the declarations which is not something I would like. I presume that most IDEs will probably automatically help you with generating or editing the header file automatically as you change code in the source file and I guess I will need to learn to live with it.

Then there's the thing with importing. It may happen that if you create a library it also has some dependencies that it needs to include. But as far as I understand one library shouldn't be included multiple times. So from what I can see most libraries check whether a global variable with an ARBITRARY name that the library chooses itself is not defined and then if that's true it defines that variable to indicate it has been included (the name of the variable is not compketely arbitrary and usually follows LIBRARY_NAME_H but the convention cannot be really relyed on). When the library includes other library it also needs to check whether the variable of that library that is defined on its import is defined. The main file should also probably check this for every library it includes because it can't know what lins were already imported by libs it imported? Am I getting something wrong or is it sometimes ok for some libraries to be included multiple times. There's the #pragma once to handle these situations?