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Thread: Kernel 6.8 RC (Release Candidate) series

  1. #1
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    Kernel 6.8 RC (Release Candidate) series

    Kernel 6.8-rc1 is available.

    Just starting our usual per kernel RC series thread here. All I have done so far is compile and boot:

    Code:
    doug@s19:~$ uname -a
    Linux s19 6.8.0-rc1-stock #1199 SMP PREEMPT_DYNAMIC Mon Jan 22 08:07:29 PST 2024 x86_64 x86_64 x86_64 GNU/Linux
    Any follow-up information on your issue would be appreciated. Please have the courtesy to report back.

  2. #2
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    Re: Kernel 6.8 RC (Release Candidate) series

    Installed. So far, so good.
    "The piano ain't got no wrong notes."

    -Thelonious Monk

  3. #3
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    Re: Kernel 6.8 RC (Release Candidate) series

    To be expected breaks nVidia and zfs FYI.

    I as well have not been running it long enough to point good or bad.
    Code:
    uname -r
    6.8.0-060800rc1-generic
    With realization of one's own potential and self-confidence in one's ability, one can build a better world.
    Dalai Lama>>
    Code Tags | System-info | Forum Guide lines | Arch Linux, Debian Unstable, FreeBSD

  4. #4
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    Re: Kernel 6.8 RC (Release Candidate) series

    After installing kernel 6.8.0-060800rc1-generic on my Ubuntu Noble from https://kernel.ubuntu.com/mainline/ firefox and snap-store do not start
    https://discourse.ubuntu.com/t/intro...elease/41958/2

  5. #5
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    Re: Kernel 6.8 RC (Release Candidate) series

    Introducing Kernel 6.8 for the 24.04 Noble Numbat Release

    https://discourse.ubuntu.com/t/intro...release/41958/

    "An experimental build of the latest Ubuntu Noble kernel based on the latest 6.8-rc* is available in ppa:canonical-kernel-team/unstable (Unstable Kernel Builds : “Canonical Kernel Team” team 6), this kernel will be updated weekly, until it will replace the main kernel in 24.04."

    How about them apples Who'da thunk it
    THE current(cy) in Documentation:
    https://help.ubuntu.com/community/PopularPages

    Happy ubuntu'n !

  6. #6
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    Re: Kernel 6.8 RC (Release Candidate) series

    Quote Originally Posted by Bashing-om View Post
    Introducing Kernel 6.8 for the 24.04 Noble Numbat Release

    https://discourse.ubuntu.com/t/intro...release/41958/

    "An experimental build of the latest Ubuntu Noble kernel based on the latest 6.8-rc* is available in ppa:canonical-kernel-team/unstable (Unstable Kernel Builds : “Canonical Kernel Team” team 6), this kernel will be updated weekly, until it will replace the main kernel in 24.04."

    How about them apples Who'da thunk it
    I am particularly interested in, and have chimed in on:
    Additional non-upstream features that we may consider for inclusion (WIP):

    Enable low-latency features by default (Bug #2023007 “kernel .config lowlatency improvements” : Bugs : linux-lowlatency package : Ubuntu)
    EDIT: Sorry, it is this related bug that I chimed in on and would like to be included in 24.04.
    Last edited by Doug S; January 28th, 2024 at 03:45 PM.
    Any follow-up information on your issue would be appreciated. Please have the courtesy to report back.

  7. #7
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    Re: Kernel 6.8 RC (Release Candidate) series

    While kernel 6.8-rc2 is available at kernel.org, the Ubuntu mainline AMD64 compile failed with the good old:

    Code:
    make[4]: /bin/sh: Resource temporarily unavailable
    EDIT: My first time booting -rc2 the system ended up in recovery mode. Another re-boot and it was fine. Operator error or something else, I don't know.

    Code:
    doug@s19:~$ uname -a
    Linux s19 6.8.0-rc2-stock #1204 SMP PREEMPT_DYNAMIC Sun Jan 28 20:11:00 PST 2024 x86_64 x86_64 x86_64 GNU/Linux
    Last edited by Doug S; January 29th, 2024 at 07:42 AM.
    Any follow-up information on your issue would be appreciated. Please have the courtesy to report back.

  8. #8
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    Re: Kernel 6.8 RC (Release Candidate) series

    6.8.0-060800rc3 from https://kernel.ubuntu.com/mainline/ works fine
    Code:
    corrado@corrado-n9-nn-1210:~$ inxi -SMxc
    System:
      Host: corrado-n9-nn-1210 Kernel: 6.8.0-060800rc3-generic arch: x86_64
        bits: 64 compiler: gcc v: 13.2.0
      Desktop: GNOME v: 45.3 Distro: Ubuntu 24.04 (Noble Numbat)
    Machine:
      Type: Desktop System: Gigabyte product: H510M H v: -CF
        serial: <superuser required>
      Mobo: Gigabyte model: H510M H v: x.x serial: <superuser required>
        UEFI: American Megatrends LLC. v: F14 date: 03/25/2022
    corrado@corrado-n9-nn-1210:~$

  9. #9
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    Re: Kernel 6.8 RC (Release Candidate) series

    For these conditions:
    CPU frequency scaling driver: intel_cpufreq (a.k.a intel_pstate in passive mode)
    CPU frequency scaling governor: schedutil
    HWP (HardWare Pstate) control (a.k.a. Intel_speedshift): Enabled

    Reduced maximum CPU frequencies are not been enforced. Kernel 6.7 was fine. Kernel 6.8-rc1 is not.
    I am about 2/3rds of the way through bisecting the kernel in an attempt to isolate the bad commit.

    I have not tried other configurations.

    Processor: Intel(R) Core(TM) i5-10600K CPU @ 4.10GHz

    EDIT:
    Code:
    # first bad commit: [9c0b4bb7f6303c9c4e2e34984c46f5a86478f84d] sched/cpufreq: Rework schedutil governor performance estimation
    Last edited by Doug S; February 10th, 2024 at 01:43 AM.
    Any follow-up information on your issue would be appreciated. Please have the courtesy to report back.

  10. #10
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    Re: Kernel 6.8 RC (Release Candidate) series

    I had problems with Kernel 6.8-rc1, Kernel 6.8-rc3 is ok for me.

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