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#1 2021-07-19 03:13:52

train__wreck
Member
Registered: 2020-08-23
Posts: 4

GRUB kernel parameter not working

I am following the wiki on how to add the kernel parameter pcie_aspm=off to GRUB. I have changed the following line in /etc/default/grub :

GRUB_CMDLINE_LINUX_DEFAULT="pcie_aspm=off loglevel=3 quiet"

And then I ran grub-mkconfig -o /boot/grub/grub.cfg. But this doesn't work: when the system boots, it does not have the parameter passed to it. When I do "cat /proc/cmdline" it says:


root=UUID=12248684-7685-4f66-b58e-bb97b1512fb6 rw initrd=\initramfs-linux.img

How do I add the parameter?

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#2 2021-07-19 07:46:16

alicavus
Member
From: $HOME, /home/$USER
Registered: 2020-12-01
Posts: 5

Re: GRUB kernel parameter not working

Did you check the content of /boot/grub/grub.cfg ? Maybe it is write protected or you misspelled something.

On GRUB boot menu screen press e, then navigate to default menu entry, manually add pcie_aspm=off after kernel line parameters and press Ctrl+X (or F10). When the system is booted up check /proc/cmdline

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#3 2021-07-19 08:41:55

train__wreck
Member
Registered: 2020-08-23
Posts: 4

Re: GRUB kernel parameter not working

grub.cfg checks out. The parameters appear on every entry, I don't understand why they aren't getting applied. I'm not physically at the machine so I'll have to make an annoying trip there to test adding the boot menu option locally.

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
insmod part_gpt
insmod part_msdos
if [ -s $prefix/grubenv ]; then
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="0"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_gpt
insmod ext2
set root='hd0,gpt2'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  12248684-7685-4f66-b58e-bb97b1512fb6
else
  search --no-floppy --fs-uuid --set=root 12248684-7685-4f66-b58e-bb97b1512fb6
fi
    font="/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
  set gfxmode=auto
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=en_US
  insmod gettext
fi
terminal_input console
terminal_output gfxterm
if [ x$feature_timeout_style = xy ] ; then
  set timeout_style=menu
  set timeout=5
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
  set timeout=5
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Arch Linux' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-12248684-7685-4f66-b58e-bb97b1512fb6' {
        load_video
        set gfxpayload=keep
        insmod gzio
        insmod part_gpt
        insmod fat
        set root='hd0,gpt1'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt1 --hint-efi=hd0,gpt1 --hint-baremetal=ahci0,gpt1  C212-388F
        else
          search --no-floppy --fs-uuid --set=root C212-388F
        fi
        echo    'Loading Linux linux ...'
        linux   /vmlinuz-linux root=UUID=12248684-7685-4f66-b58e-bb97b1512fb6 rw   loglevel=3 quiet pcie_aspm=off
        echo    'Loading initial ramdisk ...'
        initrd  /initramfs-linux.img
}
submenu 'Advanced options for Arch Linux' $menuentry_id_option 'gnulinux-advanced-12248684-7685-4f66-b58e-bb97b1512fb6' {
        menuentry 'Arch Linux, with Linux linux' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-advanced-12248684-7685-4f66-b58e-bb97b1512fb6' {
                load_video
                set gfxpayload=keep
                insmod gzio
                insmod part_gpt
                insmod fat
                set root='hd0,gpt1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt1 --hint-efi=hd0,gpt1 --hint-baremetal=ahci0,gpt1  C212-388F
                else
                  search --no-floppy --fs-uuid --set=root C212-388F
                fi
                echo    'Loading Linux linux ...'
                linux   /vmlinuz-linux root=UUID=12248684-7685-4f66-b58e-bb97b1512fb6 rw   loglevel=3 quiet pcie_aspm=off
                echo    'Loading initial ramdisk ...'
                initrd  /initramfs-linux.img
        }
        menuentry 'Arch Linux, with Linux linux (fallback initramfs)' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-fallback-12248684-7685-4f66-b58e-bb97b1512fb6' {
                load_video
                set gfxpayload=keep
                insmod gzio
                insmod part_gpt
                insmod fat
                set root='hd0,gpt1'
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt1 --hint-efi=hd0,gpt1 --hint-baremetal=ahci0,gpt1  C212-388F
                else
                  search --no-floppy --fs-uuid --set=root C212-388F
                fi
                echo    'Loading Linux linux ...'
                linux   /vmlinuz-linux root=UUID=12248684-7685-4f66-b58e-bb97b1512fb6 rw   loglevel=3 quiet pcie_aspm=off
                echo    'Loading initial ramdisk ...'
                initrd  /initramfs-linux-fallback.img
        }
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/30_uefi-firmware ###
menuentry 'UEFI Firmware Settings' $menuentry_id_option 'uefi-firmware' {
        fwsetup
}
### END /etc/grub.d/30_uefi-firmware ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg
fi
### END /etc/grub.d/41_custom ###

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