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Subject: bug#65177: udevd error with lvm-raid array leading to race condition with luks
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Hi there.
My setup is the following (LVM array containing a LUKS partition):

   (mapped-devices
    (list
     (mapped-device
       (source "HOMERAID")
       (target "HOMERAID-HOMERAID_data")
       (type lvm-device-mapping))
     (mapped-device
       (source "/dev/mapper/HOMERAID-HOMERAID_data")
       (target "luks-f0a72a6c-499b-4445-8d13-21dc99337752")
       (type luks-device-mapping))))

   (file-systems
     (cons*
       (file-system
         (mount-point "/")
         (device (uuid "2e44f3f7-bb6b-43ac-933a-e8992bf10d29" 'ext4))
         (type "ext4"))
       (file-system
         (mount-point "/home")
         (device "/dev/mapper/luks-f0a72a6c-499b-4445-8d13-21dc99337752")
         (type "ext4")
         (dependencies mapped-devices))
       (file-system
         (mount-point "/boot/efi")
         (device (uuid "DC58-946E" 'fat32))
         (type "vfat"))
      %base-file-systems)))

I use Guix System since 2022, and never had any problem booting with 
this configuration. But I did update my system (and reconfigure it) last 
week and now I can't boot. I don't have any older generation to restore 
(yes I'm dumb, I executed a delete-generations to show how it works to a 
friend), but I think the last working one was from July, 25th or just a 
bit older.

I have in my /var/log/messages :

   Aug  9 11:40:27 localhost vmunix: [    7.525877] udevd[515]: failed 
to execute '/usr/bin/systemd-run' '/usr/bin/systemd-run --no-block 
--property DefaultDependencies=no --unit lvm-activate-HOMERAID 
/gnu/store/hffkn63zx2zjadawrkxpnr486frc9n74-lvm2-2.03.21/sbin/lvm 
vgchange -aay --autoactivation event HOMERAID': No such file or directory

On the screen, during boot, I obtain a wall of messages like (not the 
exact message, sorry, can't find on syslog) "Device 
HOMERAID-HOMERAID_data could not be found: does not exist or access 
denied" and after that the system hangs.

However, I can boot successfully if and only if I press Scroll Lock just 
after modesetting and before this message ("Device ... not be found") 
appears and when I press it again (to deactivate its effect) after some 
seconds, the LUKS passphrase prompt appears and allows me to boot properly.

I can use my system but it requires multiple tries each time x) I have 
to be really synchronized with the modesetting and the message xD

Thank you very much.

Freely,
-- 
Adrien Bourmault
Co-maintainer, GNU Boot project
Elected member, XMPP Standards Foundation
Associate member, Free Software Foundation
Trésorier, Association Libre en Communs (https://www.a-lec.org)
GPG : 1DF1132CF1658A8559025C98AAD6B069819E6979

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Adrien 'neox' Bourmault <neox@HIDDEN>
Subject: bug#65177: Acknowledgement (udevd error with lvm-raid array
 leading to race condition with luks)
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Date: Wed, 09 Aug 2023 12:06:02 +0000

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65177: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D65177
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Subject: bug#65177: udevd error with lvm-raid array leading to race condition with luks
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--=-=-=
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Hi Adrien,

Adrien 'neox' Bourmault <neox@HIDDEN> writes:

>    Aug  9 11:40:27 localhost vmunix: [    7.525877] udevd[515]: failed=20
> to execute '/usr/bin/systemd-run' '/usr/bin/systemd-run --no-block=20
> --property DefaultDependencies=3Dno --unit lvm-activate-HOMERAID=20
> /gnu/store/hffkn63zx2zjadawrkxpnr486frc9n74-lvm2-2.03.21/sbin/lvm=20
> vgchange -aay --autoactivation event HOMERAID': No such file or directory

Since lvm2 2.03.14, the included udev rules use systemd-run to run
vgchange and activate the volume group.  lvm2 was updated recently from
2.03.11 to 2.03.21, then 2.03.22 (cc'ing tobias), and probably started
exhibiting this behavior then.  I think we can probably remove the
indirection through systemd-run and directly run vgchange.

Best,
=2D-=20
Josselin Poiret

--=-=-=
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hello everyone, we're also victims of this bug, in an even simpler use case.

[…]
(file-system
                                 (device "/dev/mapper/VG0-DATA")
                                 (mount-point "/VG0-DATA")
                                 (type "ext4"))
[…]

The culprit seems to be 69-dm-lvm.rules

[ 18.226226] udevd[115]: failed to execute '/usr/bin/systemd-run' 
'/usr/bin/systemd-run --no-block --property DefaultDependencies=no 
--unit lvm-activate-VG0 
/gnu/store/0hndg947ywdl5izvy63ny38hyywci66k-lvm2-2.03.22/sbin/lvm vy

I can confirm that when using time-machine to revert to lvm2 2-03.11 
versions, the VM boots.

cheers,

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This is a multi-part message in MIME format.
--------------33GaEGhdQdo1gs91wkcBXaQG
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit

Hi, as suggested by Josselin, I tested the following patch and it seems 
to do the job here.


Be careful, I'm not an udev or lvm2 specialist at all and basically, I 
don't really know if what I did is the right way to do it.


All I can say is that the VMs now boot.


Cheers,



diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index 91109c41d9..28b3c1e0bf 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -4421,6 +4421,7 @@ (define-public lvm2
                (sha256
                 (base32
"0z6w6bknhwh1n3qfkb5ij6x57q3wjf28lq3l8kh7rkhsplinjnjc"))
+              (patches (search-patches "lvm2-no-systemd.patch"))
                (modules '((guix build utils)))
                (snippet
                 '(begin
diff --git a/gnu/packages/patches/lvm2-no-systemd.patch 
b/gnu/packages/patches/lvm2-no-systemd.patch
new file mode 100644
index 0000000000..7e8a37abcc
--- /dev/null
+++ b/gnu/packages/patches/lvm2-no-systemd.patch
@@ -0,0 +1,13 @@
+diff --git a/udev/69-dm-lvm.rules.in b/udev/69-dm-lvm.rules.in
+index ff1568145..8879a2ef9 100644
+--- a/udev/69-dm-lvm.rules.in
++++ b/udev/69-dm-lvm.rules.in
+@@ -76,7 +76,7 @@ LABEL="lvm_scan"
+ # it's better suited to appearing in the journal.
+
+ IMPORT{program}="(LVM_EXEC)/lvm pvscan --cache --listvg 
--checkcomplete --vgonline --autoactivation event --udevoutput 
--journal=output $env{DEVNAME}"
+-ENV{LVM_VG_NAME_COMPLETE}=="?*", RUN+="(SYSTEMDRUN) --no-block 
--property DefaultDependencies=no --unit 
lvm-activate-$env{LVM_VG_NAME_COMPLETE} (LVM_EXEC)/lvm vgchange -aay 
--autoactivation event $env{LVM_VG_NAME_COMPLETE}"
++ENV{LVM_VG_NAME_COMPLETE}=="?*", RUN+="(LVM_EXEC)/lvm vgchange -aay 
--autoactivation event $env{LVM_VG_NAME_COMPLETE}"
+ GOTO="lvm_end"
+
+ LABEL="lvm_end"


--------------33GaEGhdQdo1gs91wkcBXaQG
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 8bit

<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
    <p _d-id="105058"><span _d-id="107552" class="--l --r
        sentence_highlight"><span _d-id="107554" class="--l --r
          hover:bg-[#B4DAE8]">Hi</span><span _d-id="107557" class="--l
          --r hover:bg-[#B4DAE8]">, as suggested by </span>Josselin, <span
          _d-id="107561" class="--l --r hover:bg-[#B4DAE8]">I</span> <span
          _d-id="107565" class="--l --r hover:bg-[#B4DAE8]">tested</span>
        <span _d-id="107569" class="--l --r hover:bg-[#B4DAE8]">the</span>
        <span _d-id="107573" class="--l --r hover:bg-[#B4DAE8]">following</span>
        <span _d-id="107577" class="--l --r hover:bg-[#B4DAE8]">patch</span>
        <span _d-id="107581" class="--l --r hover:bg-[#B4DAE8]">and</span>
        <span _d-id="107585" class="--l --r hover:bg-[#B4DAE8]">it</span>
        <span _d-id="107589" class="--l --r hover:bg-[#B4DAE8]">seems</span>
        <span _d-id="107593" class="--l --r hover:bg-[#B4DAE8]">to</span>
        <span _d-id="107597" class="--l --r hover:bg-[#B4DAE8]">do</span>
        <span _d-id="107601" class="--l --r hover:bg-[#B4DAE8]">the</span>
        <span _d-id="107605" class="--l --r hover:bg-[#B4DAE8]">job</span>
        <span _d-id="107609" class="--l --r hover:bg-[#B4DAE8]">here</span><span
          _d-id="107612" class="--l --r hover:bg-[#B4DAE8]">.</span></span></p>
    <p _d-id="105059"><span _d-id="107614" class="--l --r
        sentence_highlight"><br _d-id="105049">
      </span></p>
    <p _d-id="105060"><span _d-id="107616" class="--l --r
        sentence_highlight">Be careful, I'm not an udev or lvm2
        specialist at all and basically, I don't really know if what I
        did is the right way to do it.</span></p>
    <p _d-id="105061"><span _d-id="107618" class="--l --r
        sentence_highlight"><br _d-id="105053">
      </span></p>
    <p _d-id="105062"><span _d-id="107620" class="--l --r
        sentence_highlight">All I can say is that the VMs now boot.</span></p>
    <p></p>
    <p><br>
    </p>
    <p>Cheers,<br>
    </p>
    <p><br>
    </p>
    <p><br>
      diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm<br>
      index 91109c41d9..28b3c1e0bf 100644<br>
      --- a/gnu/packages/linux.scm<br>
      +++ b/gnu/packages/linux.scm<br>
      @@ -4421,6 +4421,7 @@ (define-public lvm2<br>
                     (sha256<br>
                      (base32<br>
                      
      "0z6w6bknhwh1n3qfkb5ij6x57q3wjf28lq3l8kh7rkhsplinjnjc"))<br>
      +              (patches (search-patches "lvm2-no-systemd.patch"))
      <br>
                     (modules '((guix build utils)))<br>
                     (snippet<br>
                      '(begin<br>
      diff --git a/gnu/packages/patches/lvm2-no-systemd.patch
      b/gnu/packages/patches/lvm2-no-systemd.patch<br>
      new file mode 100644<br>
      index 0000000000..7e8a37abcc<br>
      --- /dev/null<br>
      +++ b/gnu/packages/patches/lvm2-no-systemd.patch<br>
      @@ -0,0 +1,13 @@<br>
      +diff --git a/udev/69-dm-lvm.rules.in b/udev/69-dm-lvm.rules.in<br>
      +index ff1568145..8879a2ef9 100644<br>
      +--- a/udev/69-dm-lvm.rules.in<br>
      ++++ b/udev/69-dm-lvm.rules.in<br>
      +@@ -76,7 +76,7 @@ LABEL="lvm_scan"<br>
      + # it's better suited to appearing in the journal.<br>
      + <br>
      + IMPORT{program}="(LVM_EXEC)/lvm pvscan --cache --listvg
      --checkcomplete --vgonline --autoactivation event --udevoutput
      --journal=output $env{DEVNAME}"<br>
      +-ENV{LVM_VG_NAME_COMPLETE}=="?*", RUN+="(SYSTEMDRUN) --no-block
      --property DefaultDependencies=no --unit
      lvm-activate-$env{LVM_VG_NAME_COMPLETE} (LVM_EXEC)/lvm vgchange
      -aay --autoactivation event $env{LVM_VG_NAME_COMPLETE}"<br>
      ++ENV{LVM_VG_NAME_COMPLETE}=="?*", RUN+="(LVM_EXEC)/lvm vgchange
      -aay --autoactivation event $env{LVM_VG_NAME_COMPLETE}"<br>
      + GOTO="lvm_end"<br>
      + <br>
      + LABEL="lvm_end"<br>
      <br>
    </p>
    <br>
  </body>
</html>

--------------33GaEGhdQdo1gs91wkcBXaQG--

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Hi,

On Thu, 14 Sep 2023 at 18:23, Yann Dupont <Yann.Dupont@HIDDEN> wrote:

> All I can say is that the VMs now boot.

WDYT about this patch?

> diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
> index 91109c41d9..28b3c1e0bf 100644
> --- a/gnu/packages/linux.scm
> +++ b/gnu/packages/linux.scm
> @@ -4421,6 +4421,7 @@ (define-public lvm2
>                (sha256
>                 (base32
>                  "0z6w6bknhwh1n3qfkb5ij6x57q3wjf28lq3l8kh7rkhsplinjnjc"))
> +              (patches (search-patches "lvm2-no-systemd.patch"))
>                (modules '((guix build utils)))
>                (snippet
>                 '(begin
> diff --git a/gnu/packages/patches/lvm2-no-systemd.patch
> b/gnu/packages/patches/lvm2-no-systemd.patch
> new file mode 100644
> index 0000000000..7e8a37abcc
> --- /dev/null
> +++ b/gnu/packages/patches/lvm2-no-systemd.patch
> @@ -0,0 +1,13 @@
> +diff --git a/udev/69-dm-lvm.rules.in b/udev/69-dm-lvm.rules.in
> +index ff1568145..8879a2ef9 100644
> +--- a/udev/69-dm-lvm.rules.in
> ++++ b/udev/69-dm-lvm.rules.in
> +@@ -76,7 +76,7 @@ LABEL="lvm_scan"
> + # it's better suited to appearing in the journal.
> +
> + IMPORT{program}="(LVM_EXEC)/lvm pvscan --cache --listvg --checkcomplete
> --vgonline --autoactivation event --udevoutput --journal=output $env{DEVNAME}"
> +-ENV{LVM_VG_NAME_COMPLETE}=="?*", RUN+="(SYSTEMDRUN) --no-block
> --property DefaultDependencies=no --unit lvm-activate-$env
> {LVM_VG_NAME_COMPLETE} (LVM_EXEC)/lvm vgchange -aay --autoactivation event
> $env{LVM_VG_NAME_COMPLETE}"
> ++ENV{LVM_VG_NAME_COMPLETE}=="?*", RUN+="(LVM_EXEC)/lvm vgchange -aay
> --autoactivation event $env{LVM_VG_NAME_COMPLETE}"
> + GOTO="lvm_end"
> +
> + LABEL="lvm_end"

Josselin, is it what you had in mind?

Cheers,
simon

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Hi,

On Mon, 25 Sep 2023 at 09:35, Simon Tournier <zimon.toutoune@HIDDEN> wro=
te:

>> All I can say is that the VMs now boot.
>
> WDYT about this patch?

For easing the discussion, I extracted Yann=E2=80=99s diff and prepared a p=
atch
ready to merge.  See:

    https://issues.guix.gnu.org/issue/66586

Cheers,
simon

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Subject: bug#65177: closed (udevd error with lvm-raid array leading to
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Subject: udevd error with lvm-raid array leading to race condition with luks
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Hi there.
My setup is the following (LVM array containing a LUKS partition):

   (mapped-devices
    (list
     (mapped-device
       (source "HOMERAID")
       (target "HOMERAID-HOMERAID_data")
       (type lvm-device-mapping))
     (mapped-device
       (source "/dev/mapper/HOMERAID-HOMERAID_data")
       (target "luks-f0a72a6c-499b-4445-8d13-21dc99337752")
       (type luks-device-mapping))))

   (file-systems
     (cons*
       (file-system
         (mount-point "/")
         (device (uuid "2e44f3f7-bb6b-43ac-933a-e8992bf10d29" 'ext4))
         (type "ext4"))
       (file-system
         (mount-point "/home")
         (device "/dev/mapper/luks-f0a72a6c-499b-4445-8d13-21dc99337752")
         (type "ext4")
         (dependencies mapped-devices))
       (file-system
         (mount-point "/boot/efi")
         (device (uuid "DC58-946E" 'fat32))
         (type "vfat"))
      %base-file-systems)))

I use Guix System since 2022, and never had any problem booting with 
this configuration. But I did update my system (and reconfigure it) last 
week and now I can't boot. I don't have any older generation to restore 
(yes I'm dumb, I executed a delete-generations to show how it works to a 
friend), but I think the last working one was from July, 25th or just a 
bit older.

I have in my /var/log/messages :

   Aug  9 11:40:27 localhost vmunix: [    7.525877] udevd[515]: failed 
to execute '/usr/bin/systemd-run' '/usr/bin/systemd-run --no-block 
--property DefaultDependencies=no --unit lvm-activate-HOMERAID 
/gnu/store/hffkn63zx2zjadawrkxpnr486frc9n74-lvm2-2.03.21/sbin/lvm 
vgchange -aay --autoactivation event HOMERAID': No such file or directory

On the screen, during boot, I obtain a wall of messages like (not the 
exact message, sorry, can't find on syslog) "Device 
HOMERAID-HOMERAID_data could not be found: does not exist or access 
denied" and after that the system hangs.

However, I can boot successfully if and only if I press Scroll Lock just 
after modesetting and before this message ("Device ... not be found") 
appears and when I press it again (to deactivate its effect) after some 
seconds, the LUKS passphrase prompt appears and allows me to boot properly.

I can use my system but it requires multiple tries each time x) I have 
to be really synchronized with the modesetting and the message xD

Thank you very much.

Freely,
-- 
Adrien Bourmault
Co-maintainer, GNU Boot project
Elected member, XMPP Standards Foundation
Associate member, Free Software Foundation
Trésorier, Association Libre en Communs (https://www.a-lec.org)
GPG : 1DF1132CF1658A8559025C98AAD6B069819E6979



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From: Simon Tournier <zimon.toutoune@HIDDEN>
To: Yann Dupont <Yann.Dupont@HIDDEN>
Subject: Re: bug#65177: udevd error with lvm-raid array leading to race
 condition with luks
References: <9b755986-a86d-dfa1-f497-1d4b1d37bb5b@HIDDEN>
 <4b4bd749-fa4d-f4ea-742d-175d3da3822c@HIDDEN>
 <87pm267lid.fsf@HIDDEN> <865y35pqsh.fsf@HIDDEN>
Date: Tue, 31 Oct 2023 09:59:59 +0100
In-Reply-To: <865y35pqsh.fsf@HIDDEN> (Simon Tournier's message of "Tue, 17
 Oct 2023 11:00:14 +0200")
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Hi,

>>> All I can say is that the VMs now boot.
>>
>> WDYT about this patch?
>
> For easing the discussion, I extracted Yann=E2=80=99s diff and prepared a=
 patch
> ready to merge.  See:
>
>     https://issues.guix.gnu.org/issue/66586

Patch pushed as c0895371c5759c7d9edb330774e90f192cc4cf2c.

Closing.

Feel free to reopen if the patch does not fix the issue.

Cheers,
simon


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To: Adrien 'neox' Bourmault <neox@HIDDEN>
Subject: bug#65177: closed (Re: bug#65177: udevd error with lvm-raid array
 leading to race condition with luks)
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Your bug report

#65177: udevd error with lvm-raid array leading to race condition with luks

which was filed against the guix package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 65177 <at> debbugs.gnu.org.

--=20
65177: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D65177
GNU Bug Tracking System
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From: Simon Tournier <zimon.toutoune@HIDDEN>
To: Yann Dupont <Yann.Dupont@HIDDEN>
Subject: Re: bug#65177: udevd error with lvm-raid array leading to race
 condition with luks
References: <9b755986-a86d-dfa1-f497-1d4b1d37bb5b@HIDDEN>
 <4b4bd749-fa4d-f4ea-742d-175d3da3822c@HIDDEN>
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Hi,

>>> All I can say is that the VMs now boot.
>>
>> WDYT about this patch?
>
> For easing the discussion, I extracted Yann=E2=80=99s diff and prepared a=
 patch
> ready to merge.  See:
>
>     https://issues.guix.gnu.org/issue/66586

Patch pushed as c0895371c5759c7d9edb330774e90f192cc4cf2c.

Closing.

Feel free to reopen if the patch does not fix the issue.

Cheers,
simon


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Subject: udevd error with lvm-raid array leading to race condition with luks
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Hi there.
My setup is the following (LVM array containing a LUKS partition):

   (mapped-devices
    (list
     (mapped-device
       (source "HOMERAID")
       (target "HOMERAID-HOMERAID_data")
       (type lvm-device-mapping))
     (mapped-device
       (source "/dev/mapper/HOMERAID-HOMERAID_data")
       (target "luks-f0a72a6c-499b-4445-8d13-21dc99337752")
       (type luks-device-mapping))))

   (file-systems
     (cons*
       (file-system
         (mount-point "/")
         (device (uuid "2e44f3f7-bb6b-43ac-933a-e8992bf10d29" 'ext4))
         (type "ext4"))
       (file-system
         (mount-point "/home")
         (device "/dev/mapper/luks-f0a72a6c-499b-4445-8d13-21dc99337752")
         (type "ext4")
         (dependencies mapped-devices))
       (file-system
         (mount-point "/boot/efi")
         (device (uuid "DC58-946E" 'fat32))
         (type "vfat"))
      %base-file-systems)))

I use Guix System since 2022, and never had any problem booting with 
this configuration. But I did update my system (and reconfigure it) last 
week and now I can't boot. I don't have any older generation to restore 
(yes I'm dumb, I executed a delete-generations to show how it works to a 
friend), but I think the last working one was from July, 25th or just a 
bit older.

I have in my /var/log/messages :

   Aug  9 11:40:27 localhost vmunix: [    7.525877] udevd[515]: failed 
to execute '/usr/bin/systemd-run' '/usr/bin/systemd-run --no-block 
--property DefaultDependencies=no --unit lvm-activate-HOMERAID 
/gnu/store/hffkn63zx2zjadawrkxpnr486frc9n74-lvm2-2.03.21/sbin/lvm 
vgchange -aay --autoactivation event HOMERAID': No such file or directory

On the screen, during boot, I obtain a wall of messages like (not the 
exact message, sorry, can't find on syslog) "Device 
HOMERAID-HOMERAID_data could not be found: does not exist or access 
denied" and after that the system hangs.

However, I can boot successfully if and only if I press Scroll Lock just 
after modesetting and before this message ("Device ... not be found") 
appears and when I press it again (to deactivate its effect) after some 
seconds, the LUKS passphrase prompt appears and allows me to boot properly.

I can use my system but it requires multiple tries each time x) I have 
to be really synchronized with the modesetting and the message xD

Thank you very much.

Freely,
-- 
Adrien Bourmault
Co-maintainer, GNU Boot project
Elected member, XMPP Standards Foundation
Associate member, Free Software Foundation
Trésorier, Association Libre en Communs (https://www.a-lec.org)
GPG : 1DF1132CF1658A8559025C98AAD6B069819E6979



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Date: Tue, 31 Oct 2023 19:38:09 +0100
From: Tomas Volf <wolf@HIDDEN>
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Hi,

I think the patch is wrong.  No comment regarding the udev rule itself (I d=
o not know much about it), it does spam the logs with:

Oct 31 18:31:35 localhost vmunix: [   60.013538] udevd[327]: invalid key/va=
lue pair in file /gnu/store/a3xvv1zxzyb53r5r752q8nh9v9vd150h-udev-rules/69-=
dm-lvm.rules on line 78, starting at character 1 ('I')
Oct 31 18:31:35 localhost vmunix: [   60.013544] udevd[327]: invalid key/va=
lue pair in file /gnu/store/a3xvv1zxzyb53r5r752q8nh9v9vd150h-udev-rules/69-=
dm-lvm.rules on line 79, starting at character 32 (',')

The fix[0] for that is fairly trivial.

0: https://git.sr.ht/~graywolf/guix/commit/207794679281c1e7e5f2051719fe5c70=
5506eb23

Have a nice day,
W.

--=20
There are only two hard things in Computer Science:
cache invalidation, naming things and off-by-one errors.

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