# I went insane trying to install Linux LTS 6.12.x from AUR **URL:** \ **Category:** Newbie\ **Created:** [March 10, 2026, 3:05am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513 "2026-03-10T03:05:05Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Archie1](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/archie1/32/111095_2.png) [@Archie1](https://forum.endeavouros.com/u/Archie1)\ **Post date:** [March 10, 2026, 3:05am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/1 "2026-03-10T03:05:05Z")
So recently Arch bumped the Linux LTS kernel from 6.12.x to 6.18.x. Good news. But I wanted to stick around with 6.12.x. Irrationally have grown fond of it. So went down the AUR route tried to install the LTS Kernel 6.12.x. The command that I gave to install LTS 6.12.x was `yay -S linux-lts612` On the way I did some tweaking of the file `$XDG_CONFIG_HOME/pacman/makepkg.conf`. The two main changes that were to put in are, `-march=native -mtune=generic` in CFLAGS and also enable `lto` in the OPTIONS flag. `lto` is for `link time optimization`. Wanted to have the Kernel built for my specific host and tuned for my specific host too. Oh boy oh boy, did I not realize what I was getting into. It took freaking 10 hours to compile, while I was doing something else on the computer, used up whole RAM and then failed because the filesystem got full. The whole RAM was consumed, with only 312KB left as free. 🥴 Why oh why did the Arch team not build and keep the 6.12 LTS kernel in the extra repository as the linux-lts612 package? Is it too much to ask by mere mortals? And more importantly how do I get it to compile under say 1-2 hours. Otherwise any AUR update and bamn I am stuck with LinuxLTS kernel getting compiled for over 10 hours. ---
**Author:** ![Bink](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/bink/32/87216_2.png) [@Bink](https://forum.endeavouros.com/u/Bink)\ **Post date:** [March 10, 2026, 3:16am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/2 "2026-03-10T03:16:03Z")
You’re brave 😅 You should probably remove `-mtune=generic`, as that tunes it generically, not specifically to your CPU. You have `-march=native` which tunes it to your specific CPU already, and that’s the one you want to keep. You could also bump `-O2` to `-O3` if you want to further optimise it. That would likely increase compile times though, not reduce them, and the benefit may only be minimal, if any ([phoronix - Trying Out the Ubuntu “-O3” Optimized Build for Greater Performance](https://www.phoronix.com/review/ubuntu-o3-experiment)). ```bash CFLAGS="-march=native -O3 ......etc ``` The real game changer for compile times is parallel compilation. Make sure your `MAKEFLAGS` in `/etc/makepkg.conf` are set as this, to fully utilise all processors : ```bash MAKEFLAGS="-j$(nproc)" ``` See more details on optimisations here (although we’ve covered most of the relevant ones): > **[Optimization - makepkg - ArchWiki](https://wiki.archlinux.org/title/Makepkg#Optimization)** > > The default options match the options devtools uses to build packages for the official repositories.\[4\] As such, end users may realize more or less significant gains by tweaking the following options to match their local environment. ---
**Author:** ![Archie1](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/archie1/32/111095_2.png) [@Archie1](https://forum.endeavouros.com/u/Archie1)\ **Post date:** [March 10, 2026, 3:29am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/3 "2026-03-10T03:29:04Z")
> [@Bink](#): > > You’re brave 😅 > > You should probably remove `-mtune=generic`, as that tunes it generically, not specifically to your CPU. You have `-march=native` which tunes it to your specific CPU already, and that’s the one you want to keep. > > You could also bump `-02` to `-03` if you want to further optimise it. That would likely increase compile times though, not reduce them, and the benefit may only be minimal, if any. > > ```bash > CFLAGS="-march=native -O3 ......etc > > ``` The reason that I gave `-mtune=generic` was because I read on StackExchange or one of the blogs that in Gentoo Forums there was a claim that giving `-mtune=generic` along with `-march=native` helps in creating binaries and libraries which are a few percentages more faster and optimized. > [@Bink](#): > > The real game changer for compile times is parallel compilation. Make sure your `MAKEFLAGS` in `/etc/makepkg.conf` are set as this, to fully utilise all processors : > > ```bash > MAKEFLAGS="-j$(nproc)" > > ``` > > See more details on optimisations here (although we’ve covered most of the relevant ones): > [https://wiki.archlinux.org/title/Makepkg#Optimization](https://wiki.archlinux.org/title/Makepkg#Optimization) Will have a look at it. But does that mean, I will not be able to multi task while this is happening, since compilation will take up all the CPU cores? Also the build failed after 10 hours when I tried it. ---
**Author:** ![ajgringo619](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/ajgringo619/32/35599_2.png) [@ajgringo619](https://forum.endeavouros.com/u/ajgringo619)\ **Post date:** [March 10, 2026, 3:29am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/4 "2026-03-10T03:29:46Z")
I would strongly recommend setting up [Chaotic AUR](https://aur.chaotic.cx). It’s got tons of pre-compiled behemoths, like kernels and web browsers. The 6.12 kernel was just added today. ---
**Author:** ![Bink](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/bink/32/87216_2.png) [@Bink](https://forum.endeavouros.com/u/Bink)\ **Post date:** [March 10, 2026, 3:32am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/5 "2026-03-10T03:32:44Z")
> [@Archie1](#): > > Will have a look at it. But does that mean, I will not be able to multi task while this is happening, since compilation will take up all the CPU cores? Also the build failed after 10 hours when I tried it. I guess you can specify an amount that’ll leave you a core or two for other tasks? I haven’t tried it, but presumably this would reserve 2 processors for you?: ```bash MAKEFLAGS="-j$(nproc - 2)" ``` ---
**Author:** ![Archie1](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/archie1/32/111095_2.png) [@Archie1](https://forum.endeavouros.com/u/Archie1)\ **Post date:** [March 10, 2026, 3:32am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/6 "2026-03-10T03:32:46Z")
> [@ajgringo619](#): > > I would strongly recommend setting up [Chaotic AUR](https://aur.chaotic.cx). It’s got tons of pre-compiled behemoths, like kernels and web browsers. The 6.12 kernel was just added today. What is [Chaotic AUR](https://aur.chaotic.cx)? Is it affiliated with Arch? Will it work with `yay` or do I have to use some other packing utility for it? ---
**Author:** ![Archie1](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/archie1/32/111095_2.png) [@Archie1](https://forum.endeavouros.com/u/Archie1)\ **Post date:** [March 10, 2026, 3:33am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/7 "2026-03-10T03:33:52Z")
> [@Bink](#): > > > [@Archie1](#): > > > > Will have a look at it. But does that mean, I will not be able to multi task while this is happening, since compilation will take up all the CPU cores? Also the build failed after 10 hours when I tried it. > > I guess you can specify an amount that’ll leave you a core or two for other tasks? I haven’t tried it, but presumably this would reserve 2 processors for you?: > > ```bash > MAKEFLAGS="-j$(nproc - 2)" > > ``` I will try first with `MAKEFLAGS="-j$(nproc)"` and then `MAKEFLAGS="-j$(nproc - 2)"`. Maybe I will have to keep my updates limited to weekend nights then. I wanna bring the compilation down to a few hours, 2-3 hrs max. Not 10 hrs and counting. 😔 And to think I was thinking to take up Kernel compilation for tweaking, so that I only compile in the kernel the drives for the filesystems, CPU, GPU that I use. For example I do not have `nvidia` stuff so I would keep it out along with other unnecessary items. ---
**Author:** ![Bink](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/bink/32/87216_2.png) [@Bink](https://forum.endeavouros.com/u/Bink)\ **Post date:** [March 10, 2026, 3:35am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/8 "2026-03-10T03:35:56Z")
Some details here: > **[chaotic-aur - Unofficial user repositories - ArchWiki](https://wiki.archlinux.org/title/Unofficial_user_repositories#chaotic-aur)** > > The factual accuracy of this article or section is disputed. ---
**Author:** ![ajgringo619](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/ajgringo619/32/35599_2.png) [@ajgringo619](https://forum.endeavouros.com/u/ajgringo619)\ **Post date:** [March 10, 2026, 3:36am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/9 "2026-03-10T03:36:50Z")
Yay works fine with it. It’s a build service run by the Garuda Linux team. I install it on all my systems. ---
**Author:** ![Archie1](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/archie1/32/111095_2.png) [@Archie1](https://forum.endeavouros.com/u/Archie1)\ **Post date:** [March 10, 2026, 3:40am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/10 "2026-03-10T03:40:17Z")
> [@ajgringo619](#): > > Yay works fine with it. It’s a build service run by the Garuda Linux team. I install it on all my systems. Will it conflict with EOS? I mean we have Arch repos, EOS repo and AUR. If we add [Chaotic AUR](https://aur.chaotic.cx) into the mix then will it lead to some issues? Do you use it for Linux Kernels which are not available in Arch repos or do you use it for some other purpose too? ---
**Author:** ![Bink](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/bink/32/87216_2.png) [@Bink](https://forum.endeavouros.com/u/Bink)\ **Post date:** [March 10, 2026, 3:41am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/11 "2026-03-10T03:41:26Z")
> [@Archie1](#): > > And to think I was thinking to take up Kernel compilation for tweaking, so that I only compile in the kernel the drives for the filesystems, CPU, GPU that I use. For example I do not have `nvidia` stuff so I would keep it out along with other unnecessary items. It may be an interesting adventure, but I’m not sure you’d find all that much real-world performance benefit from it, particularly given the time and power involved in needing to compile it yourself. Maybe if it was for a super lean system? But then, a super lean system is probably going to struggle to compile it natively 😬 ---
**Author:** ![ajgringo619](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/ajgringo619/32/35599_2.png) [@ajgringo619](https://forum.endeavouros.com/u/ajgringo619)\ **Post date:** [March 10, 2026, 4:02am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/12 "2026-03-10T04:02:44Z")
Mainly for kernels. Here’s my `/etc/pacman.conf` with the repos: ```auto [endeavouros] SigLevel = PackageRequired Include = /etc/pacman.d/endeavouros-mirrorlist [core] Include = /etc/pacman.d/mirrorlist [extra] Include = /etc/pacman.d/mirrorlist [multilib] Include = /etc/pacman.d/mirrorlist [chaotic-aur] Include = /etc/pacman.d/chaotic-mirrorlist ``` Since regular AUR packages are always installed last, the order-of-preference should be fine. Sometimes you’ll show packages that are installed from multiple repos, like this example with `downgrade`: ```auto $ yay -Ss downgrade aur/downgrade 12.0.1-1 (+876 9.79) (Installed) Bash script for downgrading one or more packages to a version in your cache or the A.L.A. chaotic-aur/downgrade 12.0.1-1 (30.0 KiB 83.6 KiB) (Installed) Bash script for downgrading one or more packages to a version in your cache or the A.L.A. endeavouros/downgrade 12.0.1-1 (38.6 KiB 83.6 KiB) (Installed) Bash script for downgrading one or more packages to a version in your cache or the A.L.A. endeavouros/eos-downgrade 0.26-1 (16.7 KiB 6.8 KiB) Downgrade EndeavourOS packages (currently beta quality). ``` But a simple check with `yay -Qii downgrade` shows that the installed package came from EOS: ```auto Name : downgrade Version : 12.0.1-1 Description : Bash script for downgrading one or more packages to a version in your cache or the A.L.A. Architecture : any URL : https://github.com/archlinux-downgrade/downgrade Licenses : GPL Groups : None Provides : None Depends On : pacman-contrib fzf Optional Deps : sudo: for installation via sudo [installed] Required By : None Optional For : None Conflicts With : None Replaces : None Installed Size : 83.56 KiB Packager : manuel Build Date : Wed 04 Mar 2026 08:09:48 AM PST Install Date : Thu 05 Mar 2026 10:25:14 AM PST Install Reason : Explicitly installed Install Script : No Validated By : Signature Backup Files : /etc/xdg/downgrade/downgrade.conf [unmodified] Extended Data : pkgtype=pkg ``` It’s a bit confusing, but you’ll quickly get used to it. ---
**Author:** ![dalto](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/dalto/32/5577_2.png) [@dalto](https://forum.endeavouros.com/u/dalto)\ **Post date:** [March 10, 2026, 11:07am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/13 "2026-03-10T11:07:45Z")
> [@Archie1](#): > > If we add [Chaotic AUR](https://aur.chaotic.cx) into the mix then will it lead to some issues? It can lead to issues on occasion when updating, yes. Many of your AUR packages will also start coming from chaotic instead of AUR and you will lose the ability to easily inspect the diffs on updates. ---
**Author:** ![Archie1](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/archie1/32/111095_2.png) [@Archie1](https://forum.endeavouros.com/u/Archie1)\ **Post date:** [March 11, 2026, 3:46am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/14 "2026-03-11T03:46:35Z")
> [@dalto](#): > > > [@Archie1](#): > > > > If we add [Chaotic AUR](https://aur.chaotic.cx) into the mix then will it lead to some issues? > > It can lead to issues on occasion when updating, yes. Many of your AUR packages will also start coming from chaotic instead of AUR and you will lose the ability to easily inspect the diffs on updates. Is there no way to tell AUR utilities or PacMan utilities that so and so package comes from Arch. X y and z comes from EOS while only some of the linux kernels comes from Chaotic AUR? ---
**Author:** ![Archie1](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/archie1/32/111095_2.png) [@Archie1](https://forum.endeavouros.com/u/Archie1)\ **Post date:** [March 11, 2026, 3:49am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/15 "2026-03-11T03:49:05Z")
> [@ajgringo619](#): > > But a simple check with `yay -Qii downgrade` shows that the installed package came from EOS: > > ```auto > Name : downgrade > Version : 12.0.1-1 > Description : Bash script for downgrading one or more packages to a version in your cache or the > A.L.A. > Architecture : any > URL : https://github.com/archlinux-downgrade/downgrade > Licenses : GPL > Groups : None > Provides : None > Depends On : pacman-contrib fzf > Optional Deps : sudo: for installation via sudo [installed] > Required By : None > Optional For : None > Conflicts With : None > Replaces : None > Installed Size : 83.56 KiB > Packager : manuel > Build Date : Wed 04 Mar 2026 08:09:48 AM PST > Install Date : Thu 05 Mar 2026 10:25:14 AM PST > Install Reason : Explicitly installed > Install Script : No > Validated By : Signature > Backup Files : /etc/xdg/downgrade/downgrade.conf [unmodified] > Extended Data : pkgtype=pkg > > ``` > > It’s a bit confusing, but you’ll quickly get used to it. Does the URL determine the repo from which the package has been pulled? It seems that labels like `[endeavouros]`, `[core]`, `[extra]` are not used by the command `yay -Qii downgrade` ---
**Author:** ![ajgringo619](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/ajgringo619/32/35599_2.png) [@ajgringo619](https://forum.endeavouros.com/u/ajgringo619)\ **Post date:** [March 11, 2026, 5:47am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/16 "2026-03-11T05:47:11Z")
> [@Archie1](#): > > Does the URL determine the repo from which the package has been pulled? It seems that labels like `[endeavouros]`, `[core]`, `[extra]` are not used by the command `yay -Qii downgrade` Not in this case, no. If you do `yay -Sii downgrade`, you’ll get results from the EOS and Chaotic AUR repos, both using the same source URL. Even running `yay -Sii endeavouros/downgrade` returns this: ```auto Repository : endeavouros Name : downgrade Version : 12.0.1-1 Description : Bash script for downgrading one or more packages to a version in your cache or the A.L.A. Architecture : any URL : https://github.com/archlinux-downgrade/downgrade Licenses : GPL Groups : None Provides : None Depends On : pacman-contrib fzf Optional Deps : sudo: for installation via sudo Required By : None Optional For : eos-downgrade pacui Conflicts With : None Replaces : None Download Size : 38.65 KiB Installed Size : 83.56 KiB Packager : manuel Build Date : Wed 04 Mar 2026 08:09:48 AM PST MD5 Sum : None SHA-256 Sum : 6e915eb4549a03aa14d1cef59a8ec4ef24512020bf6302fd411ec3999e219e1b Signatures : A367FB01AE54040E Extended Data : None ``` ---
**Author:** ![Archie1](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/archie1/32/111095_2.png) [@Archie1](https://forum.endeavouros.com/u/Archie1)\ **Post date:** [March 11, 2026, 6:50am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/17 "2026-03-11T06:50:06Z")
> [@ajgringo619](#): > > > [@Archie1](#): > > > > Does the URL determine the repo from which the package has been pulled? It seems that labels like `[endeavouros]`, `[core]`, `[extra]` are not used by the command `yay -Qii downgrade` > > Not in this case, no. If you do `yay -Sii downgrade`, you’ll get results from the EOS and Chaotic AUR repos, both using the same source URL. Even running `yay -Sii endeavouros/downgrade` returns this: > > ```auto > Repository : endeavouros > Name : downgrade > Version : 12.0.1-1 > Description : Bash script for downgrading one or more packages to a version in your cache or the > A.L.A. > Architecture : any > URL : https://github.com/archlinux-downgrade/downgrade > Licenses : GPL > Groups : None > Provides : None > Depends On : pacman-contrib fzf > Optional Deps : sudo: for installation via sudo > Required By : None > Optional For : eos-downgrade pacui > Conflicts With : None > Replaces : None > Download Size : 38.65 KiB > Installed Size : 83.56 KiB > Packager : manuel > Build Date : Wed 04 Mar 2026 08:09:48 AM PST > MD5 Sum : None > SHA-256 Sum : 6e915eb4549a03aa14d1cef59a8ec4ef24512020bf6302fd411ec3999e219e1b > Signatures : A367FB01AE54040E > Extended Data : None > > ``` So is there any other pacman utility like `paru` or something else which can show this information? i.e. which repository and what label was used to download the package? It is surprising `yay` does not have the ability to link the label, the repository url with the package. It should be there. Maybe this is a bug in `pacman`/`yay`? This can get messy fast. If we have `linux-lts` and `linux-lts612` packages and both are available in Arch Repor/AUR as well as Chaotic AUR then an update will massively screw up everything. ---
**Author:** ![ajgringo619](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/ajgringo619/32/35599_2.png) [@ajgringo619](https://forum.endeavouros.com/u/ajgringo619)\ **Post date:** [March 11, 2026, 7:15am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/18 "2026-03-11T07:15:27Z")
> [@Archie1](#): > > This can get messy fast. If we have `linux-lts` and `linux-lts612` packages and both are available in Arch Repor/AUR as well as Chaotic AUR then an update will massively screw up everything. It’s really not a problem. As I mentioned above, repos in `/etc/pacman.conf` always take priority over the AUR. The only potential issue - it’s really more of an inconvenience than anything else - it when you upgrade an AUR package before Chaotic-AUR has built the new binary. In your example above, the (2) LTS packages are completely different, and can actually be installed at the same time. ---
**Author:** ![dalto](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/dalto/32/5577_2.png) [@dalto](https://forum.endeavouros.com/u/dalto)\ **Post date:** [March 11, 2026, 11:47am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/19 "2026-03-11T11:47:49Z")
> [@Archie1](#): > > So is there any other pacman utility like `paru` or something else which can show this information? i.e. which repository and what label was used to download the package? It is surprising `yay` does not have the ability to link the label, the repository url with the package. It should be there. Maybe this is a bug in `pacman`/`yay`? It isn’t a bug, it is how pacman works. Arch doesn’t expect you to use 3rd party repositories that conflict in this way. If you choose to, this will always be a problem. Pacman does not track where software was installed from. > [@Archie1](#): > > This can get messy fast. If we have `linux-lts` and `linux-lts612` packages and both are available in Arch Repor/AUR as well as Chaotic AUR then an update will massively screw up everything. It won’t massively screw things up but it will cause most of your AUR packages to updated from chaotic-aur instead. There may also occassionally be library conflicts caused by chaotic-aur depending on which packages you install. ---
**Author:** ![MyNameIsRichard](https://forum.endeavouros.com/user_avatar/forum.endeavouros.com/mynameisrichard/32/111876_2.png) [@MyNameIsRichard](https://forum.endeavouros.com/u/MyNameIsRichard)\ **Post date:** [March 11, 2026, 11:49am UTC](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513/20 "2026-03-11T11:49:23Z")
> [@dalto](#): > > There may also occassionally be library conflicts caused by chaotic-aur depending on which packages you install. That must be the same with the AUR as well. [Next page](https://forum.endeavouros.com/t/i-went-insane-trying-to-install-linux-lts-6-12-x-from-aur/78513.md?page=2)