@rzr Hi. It appeared only once, after a host reboot. If it shows again, I'll let you know.

I get this in dmesg after the latest updates :

[   54.673443] python3[3691]: segfault at 200000 ip 00007f16eb8eca9f sp 00007ffd                                                                                                             b84e9ff0 error 4 in libpython3.6m.so.1.0[7f16eb804000+28d000]
[   54.673450] Code: 01 00 00 8d 5f ff 48 8d 2d de 3a 3c 00 c1 eb 03 44 8d 24 1b                                                                                                              4e 8b 44 e5 00 49 8b 70 10 49 39 f0 74 5f 49 8b 40 08 41 83 00 01 <48> 8b 38 48                                                                                                              85 ff 49 89 78 08 74 0d 48 83 c4 10 5b 5d 41 5c c3 0f
[   84.587661] xapi[3697]: segfault at 7f28cacaea40 ip 00007f28c6df0ec2 sp 00007                                                                                                             f289a5b8af0 error 6 in libjemalloc.so.2[7f28c6d85000+85000]
[   84.587669] Code: 48 2b 73 08 44 8b 4d 84 ba 01 00 00 00 49 83 c2 01 49 0f af                                                                                                              f1 4c 8d 0d ac 72 42 00 48 89 f1 48 c1 ee 26 48 c1 e9 20 48 d3 e2 <48> 31 54 f3                                                                                                              40 48 8b 8d 58 ff ff ff 48 8b 33 48 8d be 00 00 00 10

Kernel command line: BOOT_IMAGE=/boot/vmlinuz-6.12.57+deb13-amd64 root=UUID=d706ed91-c2dd-4c8f-92cb-d2a595e24fe4 ro quiet splash i915.force_probe=7d67 i915.enable_guc=3 i915.max_vfs=7

Try to remove the i915 options and rebuild grub then reboot. see if that errors regarding guc pops up again,

I don't see in modinfo i915 that value of enable_guc=3

parm: enable_guc:Enable GuC load for GuC submission and/or HuC load. Required functionality can be selected using bitmask values. (-1=auto [default], 0=disable, 1=GuC submission, 2=HuC load) (int)

@dthenot

They appear now. I will try to identify them manually. Thanks for the tip.

@stormi daemon.txt

Attached. Please rename it as tgz and extract it as I couldn't uploaded as an archive file.

Strange thing the disks don't appear in xen orchestra but they are on the drive:

[14:04 xcp-ng-akz zfs]# ls -l
total 34863861
-rw-r--r-- 1 root root 393216 Dec 10 11:19 2b94bb8f-b44d-4c3d-9844-0b2c80e7d11c.qcow2
-rw-r--r-- 1 root root 16969367552 Dec 17 09:15 37c89d4e-93d0-4f47-a340-4add9fb91307.qcow2
-rw-r--r-- 1 root root 5435228160 Dec 16 18:41 67d7cb86-864b-4bfc-9ec6-f54dbb9c9f45.qcow2
-rw-r--r-- 1 root root 10212737024 Dec 17 09:37 740d3e10-ebc9-42a3-bc7c-849f6bcc0e61.qcow2
-rw-r--r-- 1 root root 2685730816 Dec 16 14:52 76dc4b94-ad88-4514-87ef-99357b93daaf.qcow2
-rw-r--r-- 1 root root 197408 Dec 10 11:19 8158436c-327a-4dcf-ba49-56e73006ed66.qcow2
-rw-r--r-- 1 root root 11897602048 Dec 17 10:09 e219112b-73b7-46a4-8fcb-4ee8810b3625.qcow2
-rw-r--r-- 1 root root 11566120960 Dec 10 09:51 f5d157cb-39df-482b-a39d-432a90d60e89.qcow2
-rw-r--r-- 1 root root 1984 Dec 10 11:02 filelog.txt

[14:07 xcp-ng-akz zfs]# zfs list
NAME USED AVAIL REFER MOUNTPOINT
ZFS_Pool 33.3G 416G 33.2G /mnt/zfs
[14:07 xcp-ng-akz zfs]# zpool list
NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
ZFS_Pool 464G 33.3G 431G - - 5% 7% 1.00x ONLINE -
[14:07 xcp-ng-akz zfs]# zpool status
pool: ZFS_Pool
state: ONLINE
config:

NAME        STATE     READ WRITE CKSUM
ZFS_Pool    ONLINE       0     0     0
  sda       ONLINE       0     0     0

errors: No known data errors

@ronan-a SMlog.txt
Attached. Please rename it as tgz and extract it as I couldn't uploaded as an archive file.

@dinhngtu no ouput from that command.

@dinhngtu xe sr-list
uuid ( RO) : 5956893e-7041-d424-a35e-6e7449238663
name-label ( RW): LocalISO
name-description ( RW):
host ( RO): xcp-ng-akz
type ( RO): iso
content-type ( RO): iso

uuid ( RO) : dccbfe9d-3e28-2163-2ea9-b0e972a42804
name-label ( RW): DVD drives
name-description ( RW): Physical DVD drives
host ( RO): xcp-ng-akz
type ( RO): udev
content-type ( RO): iso

uuid ( RO) : 8e908932-0577-d6f0-3133-14d94a317b90
name-label ( RW): LocalZFS
name-description ( RW):
host ( RO): xcp-ng-akz
type ( RO): zfs
content-type ( RO): user

uuid ( RO) : b37d8ad6-d9fa-203b-b057-a834908ae0e7
name-label ( RW): Removable storage
name-description ( RW):
host ( RO): xcp-ng-akz
type ( RO): udev
content-type ( RO): disk

uuid ( RO) : 34133934-0724-f9c1-3831-79cf54445fae
name-label ( RW): XCP-ng Tools
name-description ( RW): XCP-ng Tools ISOs
host ( RO): xcp-ng-akz
type ( RO): iso
content-type ( RO): iso!

Screenshot from 2025-12-17 11-42-47.png

@dinhngtu Yes. Like I said, all was good before the update from testing. The host xcp-ng is on another drive and the zfs pool is on other ssd if that matters. The host is using ext4 partitions.

lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme0n1 259:0 0 238.5G 0 disk
├─nvme0n1p5 259:4 0 4G 0 part /var/log
├─nvme0n1p3 259:3 0 512M 0 part /boot/efi
├─nvme0n1p1 259:1 0 18G 0 part /
├─nvme0n1p6 259:5 0 1G 0 part [SWAP]
└─nvme0n1p2 259:2 0 18G 0 part
sda 8:0 0 465.8G 0 disk
├─sda9 8:9 0 8M 0 part
└─sda1 8:1 0 465.8G 0 part

@dinhngtu No. It's a local SSD mounted with the zfs pool. Everything worked before the update. I don't see other errors in the host.

@dinhngtu [11:31 xcp-ng-akz ~]# zpool status
pool: ZFS_Pool
state: ONLINE
config:

NAME        STATE     READ WRITE CKSUM
ZFS_Pool    ONLINE       0     0     0
  sda       ONLINE       0     0     0

errors: No known data errors

I guess so...

@flakpyro I did what you said about clearing certs and reinstall them, still no go.

@stormi on some yes on some no...I did enabled on one but no go.
They used to work before the update, no matter if secure boot was enabled or not.

Updated to testing. Now all the VM's I have boot into the uefi shell.
Something is broken with this update.

@vhaelan Is the intel graphics module loaded ?

lsmod | grep i915
i915 5373952 24
drm_buddy 32768 2 xe,i915
ttm 135168 3 drm_ttm_helper,xe,i915
i2c_algo_bit 20480 2 xe,i915
drm_display_helper 331776 2 xe,i915
cec 106496 3 drm_display_helper,xe,i915
video 81920 2 xe,i91

sudo dmesg | grep i915
[ 5.855595] i915 0000:00:08.0: [drm] Found alderlake_p/alderlake_n (device ID 46d1) integrated display version 13.00 stepping D0
[ 5.858477] i915 0000:00:08.0: [drm] VT-d active for gfx access
[ 5.858739] i915 0000:00:08.0: [drm] Using Transparent Hugepages
[ 5.859307] i915 0000:00:08.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x4556
[ 5.859312] i915 0000:00:08.0: [drm] Failed to find VBIOS tables (VBT)
[ 5.860012] i915 0000:00:08.0: vgaarb: VGA decodes changed: olddecodes=io+mem,decodes=none:owns=io+mem
[ 5.878556] i915 0000:00:08.0: [drm] Finished loading DMC firmware i915/adlp_dmc.bin (v2.20)
[ 7.806109] i915 0000:00:08.0: [drm] [ENCODER:204:DDI A/PHY A] failed to retrieve link info, disabling eDP
[ 7.843768] i915 0000:00:08.0: [drm] GT0: GuC firmware i915/tgl_guc_70.bin version 70.49.4
[ 7.843776] i915 0000:00:08.0: [drm] GT0: HuC firmware i915/tgl_huc.bin version 7.9.3
[ 7.849282] i915 0000:00:08.0: [drm] GT0: HuC: authenticated for all workloads
[ 7.850868] i915 0000:00:08.0: [drm] GT0: GUC: submission enabled
[ 7.850874] i915 0000:00:08.0: [drm] GT0: GUC: SLPC enabled
[ 7.851225] i915 0000:00:08.0: [drm] GT0: GUC: RC enabled
[ 7.852797] i915 0000:00:08.0: [drm] Protected Xe Path (PXP) protected content support initialized
[ 7.854314] i915 0000:00:08.0: [drm] Registered 3 planes with drm panic
[ 7.854318] [drm] Initialized i915 1.6.0 for 0000:00:08.0 on minor 1

Also see in /etc/default/grub if there is NOMODESET in GRUB_CMDLINE_LINUX line.

That's from my Fedora 43 vm with passthrough enabled.

@vhaelan Hello. What's the output of rpm -qa | grep intel-gpu-firmware ?

Setting pci=nomsi seems to do the trick for now. Probably not optimal but it's just a VM and I didn't notice any performance issues.

I'm afraid there aren't any bios updates...the device is a chinese mini pc from aliexpress. I've spoken with the seller and he told there aren't any, at least not official ones. I don't think it's a bios issue, but something regarding the passthrough on the newer devices . maybe the kernel from xcp is too old, although it's heavily patched.

If I pass the option GRUB_CMDLINE_LINUX_DEFAULT="i915.enable_guc=0 quiet" the gui doesn't freeze totally but still lags.

Hello. I'm running a Rocky Linux 10 vm on xcp-ng latest version with gpu passthrough enabled. The host is a TOPTON mini-pc with intel Alder Lake N100 processor.

The problem is that at random times the RDP session freezes and to make it work again I have to restart the vm. The VM is running with no issues when this occurs but only the gui is not working. If I run with software rendering there are no problems at all, but that's not ideal.

The passthrough drivers are loaded correctly but something is not right.

lspci
00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II]
00:01.2 USB controller: Intel Corporation 82371SB PIIX3 USB [Natoma/Triton II] (rev 01)
00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
00:02.0 VGA compatible controller: Device 1234:1111 (rev 02)
00:03.0 Unassigned class [ff80]: XenSource, Inc. Xen Platform Device (rev 01)
00:08.0 Audio device: Intel Corporation Alder Lake-N PCH High Definition Audio Controller
00:09.0 VGA compatible controller: Intel Corporation Alder Lake-N [UHD Graphics]

lsmod | grep i915
i915 4677632 28
cec 69632 2 xe,i915
intel_gtt 24576 1 i915
drm_buddy 28672 2 xe,i915
i2c_algo_bit 20480 2 xe,i915
drm_display_helper 286720 2 xe,i915
video 81920 2 xe,i915
ttm 110592 4 drm_vram_helper,drm_ttm_helper,xe,i915

I've tried even with a newer distro as Debian Testing but it's the same result.