Eu tenho um laptop pessoal que é um Thinkpad T480. Escrevi sobre o mesmo aqui: entrei pra moda do laptop refurbished. Como não estou usando ele pra muita coisa e tenho também um Thinkpad pro trabalho, deixo o meu pra rodar o último Ubuntu.

E estava com o oneiric, 24.10, quando tentei fazer upgrade pro plucky, 25.04. E tive um belo dum crash no zfs.

  
------------[ cut here ]------------
WARNING: CPU: 0 PID: 227 at drivers/usb/typec/ucsi/ucsi.c:1390 ucsi_reset_ppm+0x1ad/0x1c0 [typec_ucsi]
Modules linked in: zfs(PO) spl(O) dm_crypt hid_multitouch hid_generic cdc_ncm cdc_ether usbnet uas mii usbhid hid usb_storage crct10dif_pclmul crc32_pclmul polyval_clmulni polyval_generic nvme ghash_clmulni_intel snd sha256_ssse3 soundcore sha1_ssse3 nvme_core e1000e video thunderbolt ucsi_acpi psmouse nvme_auth xhci_pci typec_ucsi typec xhci_pci_renesas sparse_keymap platform_profile wmi aesni_intel crypto_simd cryptd
CPU: 0 UID: 0 PID: 227 Comm: kworker/0:2 Tainted: P           O       6.11.0-25-generic #25-Ubuntu
Tainted: [P]=PROPRIETARY_MODULE, [O]=OOT_MODULE
Hardware name: LENOVO 20L6S4G700/20L6S4G700, BIOS N24ET76W (1.51 ) 02/27/2024
Workqueue: events_long ucsi_init_work [typec_ucsi]
RIP: 0010:ucsi_reset_ppm+0x1ad/0x1c0 [typec_ucsi]
Code: ff 8b 55 bc 81 e2 00 00 00 08 0f 85 33 ff ff ff 4c 89 75 c8 48 8b 05 72 9d 4a cb 49 39 c5 79 94 b8 92 ff ff ff e9 19 ff ff ff <0f> 0b e9 57 ff ff ff e8 17 1b 17 ca 0f 1f 80 00 00 00 00 90 90 90
RSP: 0018:ffffba53c03a3d80 EFLAGS: 00010206
RAX: 0000000008000000 RBX: ffff9d0102192800 RCX: 0000000000000000
RDX: 00000000fffb83c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffba53c03a3dd0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffba53c03a3d8c
R13: 00000000fffb83be R14: ffff9d0101a4fc00 R15: ffff9d01021928c0
FS:  0000000000000000(0000) GS:ffff9d0666200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005799b59ce675 CR3: 00000003afe3e004 CR4: 00000000003706f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ? show_trace_log_lvl+0x1be/0x310
 ? show_trace_log_lvl+0x1be/0x310
 ? ucsi_init+0x32/0x310 [typec_ucsi]
 ? show_regs.part.0+0x22/0x30
 ? show_regs.cold+0x8/0x10
 ? ucsi_reset_ppm+0x1ad/0x1c0 [typec_ucsi]
 ? __warn.cold+0xa7/0x101
 ? ucsi_reset_ppm+0x1ad/0x1c0 [typec_ucsi]
 ? report_bug+0x114/0x160
 ? handle_bug+0x6e/0xb0
 ? exc_invalid_op+0x18/0x80
 ? asm_exc_invalid_op+0x1b/0x20
 ? ucsi_reset_ppm+0x1ad/0x1c0 [typec_ucsi]
 ucsi_init+0x32/0x310 [typec_ucsi]
 ucsi_init_work+0x18/0x90 [typec_ucsi]
 process_one_work+0x174/0x350
 worker_thread+0x31a/0x450
 ? _raw_spin_lock_irqsave+0xe/0x20
 ? __pfx_worker_thread+0x10/0x10
 kthread+0xe1/0x110
 ? __pfx_kthread+0x10/0x10
 ret_from_fork+0x44/0x70
 ? __pfx_kthread+0x10/0x10
 ret_from_fork_asm+0x1a/0x30 
</TASK>
---[ endtrace 0000000000000000 ]---   
WARNING: CPU: 0 PID: 978 at /build/linux-Ajk80v/linux-6.11.0/debian/build/build-generic/____________________________________________________________________________dkms/build/zfs/2.2.6/build/module/zfs/zfs_log.c:817 zfs_log_setsaxattr+0x140/0x150 [zfs]
Modules linked in: msr(+) parport_pc ppdev lp parport efi_pstore nfnetlink dmi_sysfs ip_tables x_tables autofs4 typec_displayport zfs(PO) spl(O) dm_crypt hid_multitouch hid_generic cdc_ncm cdc_ether usbnet uas mii usbhid hid usb_storage crct10dif_pclmul crc32_pclmul polyval_clmulni polyval_generic nvme ghash_clmulni_intel snd sha256_ssse3 soundcore sha1_ssse3 nvme_core e1000e video thunderbolt ucsi_acpi psmouse nvme_auth xhci_pci typec_ucsi typec xhci_pci_renesas sparse_keymap platform_profile wmi aesni_intel crypto_simd cryptd
CPU: 0 UID: 0 PID: 978 Comm: systemd-random- Tainted: P        W  O       6.11.0-25-generic #25-Ubuntu
Tainted: [P]=PROPRIETARY_MODULE, [W]=WARN, [O]=OOT_MODULE
Hardware name: LENOVO 20L6S4G700/20L6S4G700, BIOS N24ET76W (1.51 ) 02/27/2024
RIP: 0010:zfs_log_setsaxattr+0x140/0x150 [zfs]
Code: ff ff ff 31 c9 48 c7 c2 c0 94 e5 c0 4c 89 f6 4c 89 55 c0 48 c7 c7 68 8e e5 c0 4c 89 4d d0 c6 05 4a 50 13 00 01 e8 a0 c3 a9 c8 <0f> 0b 4c 8b 55 c0 4c 8b 4d d0 e9 30 ff ff ff 90 90 90 90 90 90 90
RSP: 0018:ffffba53c192f748 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff9d0107f7bdb0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffba53c192f790 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff9d011613e800
R13: ffff9d010b3499c0 R14: 000000000000001c R15: 0000000000000000
FS:  00007a57caef8980(0000) GS:ffff9d0666200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007a57cbf071e0 CR3: 000000010a016003 CR4: 00000000003706f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ? show_trace_log_lvl+0x1be/0x310
 ? show_trace_log_lvl+0x1be/0x310
 ? zfs_sa_set_xattr+0x34a/0x3b0 [zfs]
 ? show_regs.part.0+0x22/0x30
 ? show_regs.cold+0x8/0x10
 ? zfs_log_setsaxattr+0x140/0x150 [zfs]
 ? __warn.cold+0xa7/0x101
 ? zfs_log_setsaxattr+0x140/0x150 [zfs]
 ? report_bug+0x114/0x160
 ? handle_bug+0x6e/0xb0
 ? exc_invalid_op+0x18/0x80
 ? asm_exc_invalid_op+0x1b/0x20
 ? zfs_log_setsaxattr+0x140/0x150 [zfs]
 ? zfs_log_setsaxattr+0x140/0x150 [zfs]
 zfs_sa_set_xattr+0x34a/0x3b0 [zfs]
 zpl_xattr_set_sa+0x102/0x200 [zfs]
 zpl_xattr_set+0x21c/0x290 [zfs]
 __zpl_xattr_user_set+0x128/0x170 [zfs]
 zpl_xattr_user_set+0x22/0x40 [zfs]
 __vfs_removexattr+0x81/0xd0
 __vfs_removexattr_locked+0xe5/0x1a0
 ? touch_atime+0xbe/0x120  
vfs_removexattr+0x59/0x110
 __do_sys_fremovexattr+0x130/0x1c0
 __x64_sys_fremovexattr+0x15/0x20
 x64_sys_call+0x1fc7/0x22b0
 do_syscall_64+0x7e/0x170
 ? filemap_map_pages+0x34f/0x570
 ? xa_load+0x73/0xb0
 ? do_read_fault+0xfd/0x200
 ? do_fault+0x183/0x210
 ? generic_file_llseek+0x24/0x40
 ? zpl_llseek+0x32/0xd0 [zfs]
 ? ksys_lseek+0x7d/0xd0
 ? syscall_exit_to_user_mode+0x4e/0x250
 ? do_syscall_64+0x8a/0x170
 ? __count_memcg_events+0x86/0x160
 ? count_memcg_events.constprop.0+0x2a/0x50
 ? handle_mm_fault+0x1bb/0x2d0
 ? do_user_addr_fault+0x5e9/0x7e0
 ? irqentry_exit_to_user_mode+0x43/0x250
 ? irqentry_exit+0x43/0x50
 ? exc_page_fault+0x96/0x1c0
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7a57cba5d4eb
Code: 73 01 c3 48 8b 0d 0d 79 0e 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 c7 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d dd 78 0e 00 f7 d8 64 89 01 48
RSP: 002b:00007ffe118d0498 EFLAGS: 00000246 ORIG_RAX: 00000000000000c7
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007a57cba5d4eb
RDX: 000000000000001a RSI: 00006015c386c08b RDI: 0000000000000005
RBP: 00007ffe118d05d0 R08: 00007a57cbb45b20 R09: 00000000000000c0
R10: 0000601603619fc0 R11: 0000000000000246 R12: 0000000000000005
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK> 
 

E ficava nisso. Tinha de mandar um zfs rollback nos volumes pra conseguir voltar a usar. E tentar o upgrade novamente.

Depois de muito tentar, resolvi abrir um bug report no launchpad. Meu bug foi marcado como duplicado e passei então a interagir no bug onde o problema foi reportado primeiramente.

tl;dr: o bug era do zfs no kernel padrão que o plucky instala. A correção exige upgrade tanto do zfs quanto do kernel antes de ir pro upgrade do plucky.

Da primeira vez eu errei esse upgrade. E precisei recuperar o zfs pra voltar o snapshot.

E mais um problema já que não existe um procedimento bem descritivo de como fazer isso. Ou tem?

Sim tem. E mais de um.

Tive de recuperar algumas vezes o sistema. Então fiquei meio que craque em fazer isso. O esquema está abaixo:

    
root@ubuntu:~# lsblk -f
NAME        FSTYPE     FSVER            LABEL                    UUID                                 FSAVAIL FSUSE% MOUNTPOINTS
loop0       squashfs   4.0                                                                                  0   100% /rofs
loop1       squashfs   4.0                                                                                           
loop2       squashfs   4.0                                                                                           
loop3       squashfs   4.0                                                                                  0   100% /snap/bare/5
loop4       squashfs   4.0                                                                                  0   100% /snap/core22/1748
loop5       squashfs   4.0                                                                                  0   100% /snap/firefox/5751
loop6       squashfs   4.0                                                                                  0   100% /snap/firmware-updater/167
loop7       squashfs   4.0                                                                                  0   100% /snap/gnome-42-2204/202
loop8       squashfs   4.0                                                                                  0   100% /snap/gtk-common-themes/1535
loop9       squashfs   4.0                                                                                  0   100% /snap/snap-store/1248
loop10      squashfs   4.0                                                                                  0   100% /snap/thunderbird/644
loop11      squashfs   4.0                                                                                  0   100% /snap/ubuntu-desktop-bootstrap/315
loop12      squashfs   4.0                                                                                  0   100% /snap/snapd-desktop-integration/253
loop13      squashfs   4.0                                                                                  0   100% /snap/snapd/23545
sda         iso9660    Joliet Extension Ubuntu 24.04.2 LTS amd64 2025-02-15-09-15-26-00                              
├─sda1      iso9660    Joliet Extension Ubuntu 24.04.2 LTS amd64 2025-02-15-09-15-26-00                     0   100% /cdrom
├─sda2      vfat       FAT12            ESP                      B5A5-8010                                           
├─sda3                                                                                                               
└─sda4      ext4       1.0              writable                 5729a291-83ad-4b15-91b1-09a17bfc9504    1.3G     4% /var/crash
                                                                                                                     /var/log
sdb                                                                                                                  
nvme0n1                                                                                                              
├─nvme0n1p1 vfat       FAT32                                     C399-15AF                                           
├─nvme0n1p2 zfs_member 5000             bpool                    4626876014803904226                                 
├─nvme0n1p3                                                                                                          
└─nvme0n1p4 zfs_member 5000             rpool                    15334588309526604034                                

root@ubuntu:~# zpool import -f rpool
root@ubuntu:~# zpool list
NAME    SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP    HEALTH  ALTROOT
rpool   936G   365G   571G        -         -     6%    39%  1.00x    ONLINE  -

root@ubuntu:~# cryptsetup open /dev/zvol/rpool/keystore rpool-keystore
Enter passphrase for /dev/zvol/rpool/keystore: 
root@ubuntu:~# mkdir /mnt-keystore
root@ubuntu:~# mount /dev/mapper/rpool-keystore /mnt-keystore
root@ubuntu:~# ls /mnt-keystore
lost+found  system.key

root@ubuntu:~# cat /mnt-keystore/system.key | zfs load-key -L prompt rpool
root@ubuntu:~# umount /mnt-keystore 
root@ubuntu:~# cryptsetup close rpool-keystore

root@ubuntu:~# zfs list
NAME                                               USED  AVAIL  REFER  MOUNTPOINT
rpool                                              365G   542G   192K  /
rpool/ROOT                                         106G   542G   192K  none
rpool/ROOT/ubuntu_ni6nkv                           106G   542G  11.5G  /mnt
rpool/ROOT/ubuntu_ni6nkv/srv                       352K   542G   192K  /mnt/srv
rpool/ROOT/ubuntu_ni6nkv/usr                      7.96M   542G   192K  /mnt/usr
rpool/ROOT/ubuntu_ni6nkv/usr/local                7.77M   542G  6.02M  /mnt/usr/local
rpool/ROOT/ubuntu_ni6nkv/var                      64.4G   542G   192K  /mnt/var
rpool/ROOT/ubuntu_ni6nkv/var/games                 272K   542G   192K  /mnt/var/games
rpool/ROOT/ubuntu_ni6nkv/var/lib                  60.0G   542G  24.2G  /mnt/var/lib
rpool/ROOT/ubuntu_ni6nkv/var/lib/AccountsService  1.07M   542G   212K  /mnt/var/lib/AccountsService
rpool/ROOT/ubuntu_ni6nkv/var/lib/NetworkManager   7.59M   542G   580K  /mnt/var/lib/NetworkManager
rpool/ROOT/ubuntu_ni6nkv/var/lib/apt               388M   542G   103M  /mnt/var/lib/apt
rpool/ROOT/ubuntu_ni6nkv/var/lib/dpkg             1.14G   542G   169M  /mnt/var/lib/dpkg
rpool/ROOT/ubuntu_ni6nkv/var/log                   261M   542G  92.7M  /mnt/var/log
rpool/ROOT/ubuntu_ni6nkv/var/mail                  272K   542G   192K  /mnt/var/mail
rpool/ROOT/ubuntu_ni6nkv/var/snap                 4.11G   542G  4.03G  /mnt/var/snap
rpool/ROOT/ubuntu_ni6nkv/var/spool                10.6M   542G   468K  /mnt/var/spool
rpool/ROOT/ubuntu_ni6nkv/var/www                  55.3M   542G  55.1M  /mnt/var/www
rpool/USERDATA                                     258G   542G   192K  none
rpool/USERDATA/home_39e1h7                         258G   542G   242G  /home
rpool/USERDATA/root_39e1h7                        58.8M   542G  28.4M  /root
rpool/keystore                                    39.8M   542G  16.5M  -
rpool/var                                          739M   542G   192K  /var
rpool/var/lib                                      739M   542G   192K  /var/lib
rpool/var/lib/docker                               738M   542G   729M  /var/lib/docker
root@ubuntu:~# zfs set mountpoint=/mnt rpool/ROOT/ubuntu_ni6nkv
root@ubuntu:~# zfs mount rpool/ROOT/ubuntu_ni6nkv

root@ubuntu:~# ls /mnt
bin  boot  cdrom  dev  etc  home  lib  lib32  lib64  media  mnt  opt  proc  root  run  sbin  snap  srv  sys  tmp  usr  var

root@ubuntu:~# zpool import -N -R /mnt bpool
root@ubuntu:~# zfs mount bpool/BOOT/ubuntu_ni6nkv
root@ubuntu:~# ls /mnt/boot/
System.map-6.11.0-21-generic  config-6.11.0-21-generic  efi         initrd.img-6.11.0-21-generic  initrd.img.old      memtest86+x64.bin  vmlinuz-6.11.0-21-generic  vmlinuz.old
System.map-6.11.0-24-generic  config-6.11.0-24-generic  grub        initrd.img-6.11.0-24-generic  memtest86+ia32.bin  memtest86+x64.efi  vmlinuz-6.11.0-24-generic
System.map-6.14.0-15-generic  config-6.14.0-15-generic  initrd.img  initrd.img-6.14.0-15-generic  memtest86+ia32.efi  vmlinuz            vmlinuz-6.14.0-15-generic

root@ubuntu:~# mount /dev/nvme0n1p1 /mnt/boot/efi/
root@ubuntu:~# ls /mnt/boot/efi/
EFI

root@ubuntu:~# for i in proc dev sys dev/pts; do mount -v --bind /$i /mnt/$i; done
mount: /proc bound on /mnt/proc.
mount: /dev bound on /mnt/dev.
mount: /sys bound on /mnt/sys.
mount: /dev/pts bound on /mnt/dev/pts.

root@ubuntu:~# zfs set mountpoint=/ rpool/ROOT/ubuntu_ni6nkv

Broadcast message from systemd-journald@ubuntu (Sat 2025-04-19 15:35:17 UTC):

systemd[1]: Caught , from our own process.

root@ubuntu:~# zfs list
NAME                                               USED  AVAIL  REFER  MOUNTPOINT
bpool                                              838M   953M    96K  /mnt/boot
bpool/BOOT                                         833M   953M    96K  none
bpool/BOOT/ubuntu_ni6nkv                           833M   953M   295M  /mnt/boot
rpool                                              365G   542G   192K  /
rpool/ROOT                                         106G   542G   192K  none
rpool/ROOT/ubuntu_ni6nkv                           106G   542G  11.5G  /
rpool/ROOT/ubuntu_ni6nkv/srv                       352K   542G   192K  /srv
rpool/ROOT/ubuntu_ni6nkv/usr                      7.96M   542G   192K  /usr
rpool/ROOT/ubuntu_ni6nkv/usr/local                7.77M   542G  6.02M  /usr/local
rpool/ROOT/ubuntu_ni6nkv/var                      64.4G   542G   192K  /var
rpool/ROOT/ubuntu_ni6nkv/var/games                 272K   542G   192K  /var/games
rpool/ROOT/ubuntu_ni6nkv/var/lib                  60.0G   542G  24.2G  /var/lib
rpool/ROOT/ubuntu_ni6nkv/var/lib/AccountsService  1.07M   542G   212K  /var/lib/AccountsService
rpool/ROOT/ubuntu_ni6nkv/var/lib/NetworkManager   7.59M   542G   580K  /var/lib/NetworkManager
rpool/ROOT/ubuntu_ni6nkv/var/lib/apt               388M   542G   103M  /var/lib/apt
rpool/ROOT/ubuntu_ni6nkv/var/lib/dpkg             1.14G   542G   169M  /var/lib/dpkg
rpool/ROOT/ubuntu_ni6nkv/var/log                   261M   542G  92.7M  /var/log
rpool/ROOT/ubuntu_ni6nkv/var/mail                  272K   542G   192K  /var/mail
rpool/ROOT/ubuntu_ni6nkv/var/snap                 4.11G   542G  4.03G  /var/snap
rpool/ROOT/ubuntu_ni6nkv/var/spool                10.6M   542G   468K  /var/spool
rpool/ROOT/ubuntu_ni6nkv/var/www                  55.3M   542G  55.1M  /var/www
rpool/USERDATA                                     258G   542G   192K  none
rpool/USERDATA/home_39e1h7                         258G   542G   242G  /home
rpool/USERDATA/root_39e1h7                        58.8M   542G  28.4M  /root
rpool/keystore                                    39.8M   542G  16.5M  -
rpool/var                                          739M   542G   192K  /var
rpool/var/lib                                      739M   542G   192K  /var/lib
rpool/var/lib/docker                               738M   542G   729M  /var/lib/docker
root@ubuntu:~# zfs set mountpoint=/boot bpool

root@ubuntu:~# zfs list
NAME                                               USED  AVAIL  REFER  MOUNTPOINT
bpool                                              838M   953M    96K  /mnt/boot
bpool/BOOT                                         833M   953M    96K  none
bpool/BOOT/ubuntu_ni6nkv                           833M   953M   295M  /mnt/boot
rpool                                              365G   542G   192K  /
rpool/ROOT                                         106G   542G   192K  none
rpool/ROOT/ubuntu_ni6nkv                           106G   542G  11.5G  /
rpool/ROOT/ubuntu_ni6nkv/srv                       352K   542G   192K  /srv
rpool/ROOT/ubuntu_ni6nkv/usr                      7.96M   542G   192K  /usr
rpool/ROOT/ubuntu_ni6nkv/usr/local                7.77M   542G  6.02M  /usr/local
rpool/ROOT/ubuntu_ni6nkv/var                      64.4G   542G   192K  /var
rpool/ROOT/ubuntu_ni6nkv/var/games                 272K   542G   192K  /var/games
rpool/ROOT/ubuntu_ni6nkv/var/lib                  60.0G   542G  24.2G  /var/lib
rpool/ROOT/ubuntu_ni6nkv/var/lib/AccountsService  1.07M   542G   212K  /var/lib/AccountsService
rpool/ROOT/ubuntu_ni6nkv/var/lib/NetworkManager   7.59M   542G   580K  /var/lib/NetworkManager
rpool/ROOT/ubuntu_ni6nkv/var/lib/apt               388M   542G   103M  /var/lib/apt
rpool/ROOT/ubuntu_ni6nkv/var/lib/dpkg             1.14G   542G   169M  /var/lib/dpkg
rpool/ROOT/ubuntu_ni6nkv/var/log                   261M   542G  92.7M  /var/log
rpool/ROOT/ubuntu_ni6nkv/var/mail                  272K   542G   192K  /var/mail
rpool/ROOT/ubuntu_ni6nkv/var/snap                 4.11G   542G  4.03G  /var/snap
rpool/ROOT/ubuntu_ni6nkv/var/spool                10.6M   542G   468K  /var/spool
rpool/ROOT/ubuntu_ni6nkv/var/www                  55.3M   542G  55.1M  /var/www
rpool/USERDATA                                     258G   542G   192K  none
rpool/USERDATA/home_39e1h7                         258G   542G   242G  /home
rpool/USERDATA/root_39e1h7                        58.8M   542G  28.4M  /root
rpool/keystore                                    39.8M   542G  16.5M  -
rpool/var                                          739M   542G   192K  /var
rpool/var/lib                                      739M   542G   192K  /var/lib
rpool/var/lib/docker                               738M   542G   729M  /var/lib/docker      
    
  

No fim deu certo e consegui fazer upgrade pro plucky. Mas o problema ainda existe. Não sei se será um problema quando chegar a época de upgrade do 24.04.

Espero que não.