I am occasionally seeing this again with the Impish live-server (subiquity) daily ISO images. I saw this happening only on ppc64el and on arm64, and only on preseeded installs (via answers.yaml).
This doesn't prevent the installation from succeeding: what fails is just the post-install reboot. Hard-rebooting the system results in the installed system booting correctly. This is not easy to reproduce, I went with something on these lines: for i in {1..100}; do echo "Round $i" virt-install --os-variant ubuntu18.04 --name paride-impish-preseed --memory 2048 --disk image.qcow2 --disk answers.img --cdrom impish-live-server-ppc64el.iso --noautoconsole --wait -1 || break; sleep 5; virsh destroy paride-impish-preseed || break; virsh undefine paride-impish-preseed || break; done When the problem happens virt-install will never exit as the installer system gets caught in the "SQUASHFS error: Failed to read block" error loop. I'm attaching the answers.yaml baked in answers.img (see LP: #1946398 on how to create the answers image file). Note: that answers.yaml preseeds the installation of a snap. I have the impression that it increases the probability of hitting the failure. === kernel log excerpt on failure === [ 78.374287] EXT4-fs (vda2): mounted filesystem with ordered data mode. Opts: (null). Quota mode: none. [ 79.296032] overlayfs: "xino" feature enabled using 32 upper inode bits. [ 134.464075] overlayfs: "xino" feature enabled using 2 upper inode bits. [ 355.493023] SGI XFS with ACLs, security attributes, realtime, quota, no debug enabled [ 355.513889] JFS: nTxBlock = 459, nTxLock = 3673 [ 355.536975] ntfs: driver 2.1.32 [Flags: R/O MODULE]. [ 355.564466] QNX4 filesystem 0.2.3 registered. [ 355.648190] Btrfs loaded, crc32c=crc32c-vpmsum, zoned=yes [ 372.037306] VFS: busy inodes on changed media sr0 [ 372.039566] sr 0:0:0:2: [sr0] tag#19 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=0s [ 372.039572] sr 0:0:0:2: [sr0] tag#19 Sense Key : Not Ready [current] [ 372.039575] sr 0:0:0:2: [sr0] tag#19 Add. Sense: Medium not present [ 372.039578] sr 0:0:0:2: [sr0] tag#19 CDB: Read(10) 28 00 00 00 a6 35 00 00 20 00 [ 372.039580] blk_update_request: I/O error, dev sr0, sector 170196 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0 [ 372.039633] sr 0:0:0:2: [sr0] tag#20 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=0s [ 372.039636] sr 0:0:0:2: [sr0] tag#20 Sense Key : Not Ready [current] [ 372.039638] sr 0:0:0:2: [sr0] tag#20 Add. Sense: Medium not present [ 372.039641] sr 0:0:0:2: [sr0] tag#20 CDB: Read(10) 28 00 00 00 a6 35 00 00 20 00 [ 372.039642] blk_update_request: I/O error, dev sr0, sector 170196 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 [ 372.039651] blk_update_request: I/O error, dev loop0, sector 36870 op 0x0:(READ) flags 0x800 phys_seg 1 prio class 0 [ 372.051333] SQUASHFS error: Failed to read block 0x1200dd0: -5 [ 372.051337] SQUASHFS error: Unable to read data cache entry [1200dd0] [ 372.051339] SQUASHFS error: Unable to read page, block 1200dd0, size 8380 [ 372.051461] sr 0:0:0:2: [sr0] tag#21 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=0s [ 372.051465] sr 0:0:0:2: [sr0] tag#21 Sense Key : Not Ready [current] [ 372.051468] sr 0:0:0:2: [sr0] tag#21 Add. Sense: Medium not present [ 372.051471] sr 0:0:0:2: [sr0] tag#21 CDB: Read(10) 28 00 00 00 a6 35 00 00 20 00 [ 372.051473] blk_update_request: I/O error, dev sr0, sector 170196 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 [ 372.051482] blk_update_request: I/O error, dev loop0, sector 36870 op 0x0:(READ) flags 0x800 phys_seg 1 prio class 0 [ 372.051489] SQUASHFS error: Failed to read block 0x1200dd0: -5 [ 372.051545] sr 0:0:0:2: [sr0] tag#22 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=0s [ 372.051548] sr 0:0:0:2: [sr0] tag#22 Sense Key : Not Ready [current] [ 372.051550] sr 0:0:0:2: [sr0] tag#22 Add. Sense: Medium not present [ 372.051553] sr 0:0:0:2: [sr0] tag#22 CDB: Read(10) 28 00 00 00 a6 35 00 00 20 00 [ 372.051554] blk_update_request: I/O error, dev sr0, sector 170196 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 [ 372.051562] blk_update_request: I/O error, dev loop0, sector 36870 op 0x0:(READ) flags 0x800 phys_seg 1 prio class 0 [ 372.051568] SQUASHFS error: Failed to read block 0x1200dd0: -5 [ 372.052908] sr 0:0:0:2: [sr0] tag#23 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=0s [ 372.052912] sr 0:0:0:2: [sr0] tag#23 Sense Key : Not Ready [current] [ 372.052915] sr 0:0:0:2: [sr0] tag#23 Add. Sense: Medium not present [ 372.052917] sr 0:0:0:2: [sr0] tag#23 CDB: Read(10) 28 00 00 01 56 55 00 00 20 00 [ 372.052919] blk_update_request: I/O error, dev sr0, sector 350548 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0 [ 372.052964] sr 0:0:0:2: [sr0] tag#24 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=0s [ 372.052967] sr 0:0:0:2: [sr0] tag#24 Sense Key : Not Ready [current] [ 372.052970] sr 0:0:0:2: [sr0] tag#24 Add. Sense: Medium not present [ 372.052972] sr 0:0:0:2: [sr0] tag#24 CDB: Read(10) 28 00 00 01 56 55 00 00 20 00 [ 372.052974] blk_update_request: I/O error, dev sr0, sector 350548 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 [ 372.052981] blk_update_request: I/O error, dev loop0, sector 217262 op 0x0:(READ) flags 0x800 phys_seg 1 prio class 0 [ 372.052988] SQUASHFS error: Failed to read block 0x6a15d64: -5 [ 372.052989] SQUASHFS error: Unable to read data cache entry [6a15d64] [ 372.052991] SQUASHFS error: Unable to read page, block 6a15d64, size 81b0 [ 372.053043] sr 0:0:0:2: [sr0] tag#25 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=0s [ 372.053046] sr 0:0:0:2: [sr0] tag#25 Sense Key : Not Ready [current] [ 372.053048] sr 0:0:0:2: [sr0] tag#25 Add. Sense: Medium not present [ 372.053051] sr 0:0:0:2: [sr0] tag#25 CDB: Read(10) 28 00 00 01 56 55 00 00 20 00 [ 372.053061] SQUASHFS error: Failed to read block 0x6a15d64: -5 [ 372.053112] sr 0:0:0:2: [sr0] tag#26 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=0s [ 372.053115] sr 0:0:0:2: [sr0] tag#26 Sense Key : Not Ready [current] [ 372.053117] sr 0:0:0:2: [sr0] tag#26 Add. Sense: Medium not present [ 372.053119] sr 0:0:0:2: [sr0] tag#26 CDB: Read(10) 28 00 00 01 56 55 00 00 20 00 [ 372.053128] SQUASHFS error: Failed to read block 0x6a15d64: -5 [ 372.054012] sr 0:0:0:2: [sr0] tag#27 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=0s [ 372.054016] sr 0:0:0:2: [sr0] tag#27 Sense Key : Not Ready [current] [ 372.054018] sr 0:0:0:2: [sr0] tag#27 Add. Sense: Medium not present [ 372.054021] sr 0:0:0:2: [sr0] tag#27 CDB: Read(10) 28 00 00 01 56 55 00 00 20 00 [ 372.054067] sr 0:0:0:2: [sr0] tag#28 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=0s [ 372.054069] sr 0:0:0:2: [sr0] tag#28 Sense Key : Not Ready [current] [ 372.054072] sr 0:0:0:2: [sr0] tag#28 Add. Sense: Medium not present [ 372.054074] sr 0:0:0:2: [sr0] tag#28 CDB: Read(10) 28 00 00 01 56 55 00 00 20 00 [ 372.054084] SQUASHFS error: Failed to read block 0x6a0f0c8: -5 [ 372.054086] SQUASHFS error: Unable to read data cache entry [6a0f0c8] [ 372.054087] SQUASHFS error: Unable to read page, block 6a0f0c8, size 69a4 [ 372.054188] SQUASHFS error: Failed to read block 0x6a0f0c8: -5 [ 372.054286] SQUASHFS error: Failed to read block 0x6a0f0c8: -5 [ 372.063004] SQUASHFS error: Failed to read block 0x6c9d578: -5 [ 372.063007] SQUASHFS error: Unable to read data cache entry [6c9d578] [ 372.063008] SQUASHFS error: Unable to read page, block 6c9d578, size 7f2c [ 372.063070] SQUASHFS error: Failed to read block 0x6c9d578: -5 [ 372.063128] SQUASHFS error: Failed to read block 0x6c9d578: -5 [ 372.129910] SQUASHFS error: Failed to read block 0x440bbc8: -5 [ 372.130062] SQUASHFS error: Failed to read block 0x440bbc8: -5 [ 372.130200] SQUASHFS error: Failed to read block 0x440bbc8: -5 ** Attachment added: "answers.yaml" https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1840122/+attachment/5532415/+files/answers.yaml ** Also affects: casper (Ubuntu Focal) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Focal) Importance: Undecided Status: New ** Changed in: casper (Ubuntu Focal) Status: New => Fix Released ** Changed in: casper (Ubuntu) Status: Fix Released => New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1840122 Title: System fails to reboot from live session or ubiquity-dm - squashfs_read_data failed to read block Status in casper package in Ubuntu: New Status in linux package in Ubuntu: Confirmed Status in casper source package in Bionic: Fix Released Status in linux source package in Bionic: Confirmed Status in casper source package in Eoan: Fix Released Status in linux source package in Eoan: Won't Fix Status in casper source package in Focal: Fix Released Status in linux source package in Focal: New Bug description: Last known good image: Eoan Ubuntu Desktop 20190715 Similar results started to happen with new linux-hwe kernel based on eoan for 18.04.4 release. Test Case: 1. Boot eoan desktop to a live session 2. Wait a couple of minutes until snapd settles 3. Reboot the system from the system menu or from the command line Expected result: The system reboots Actual result: The systems fails to reboot or shutdown and displays some errors about failing to unmount /cdrom and squashfs errors in a loop. Unmounting /cdrom... [FAILED] Failed unmounting /cdrom. [ OK ] Started Shuts down the "li…" preinstalled system cleanly. [ OK ] Reached target Final Step. [ OK ] Started Reboot. [ OK ] Reached target Reboot. [ 115.744188] print_req_error: I/O error, dev sr0, sector 1508872 flags 80700 [ 115.768139] print_req_error: I/O error, dev sr0, sector 1508872 flags 0 [ 115.771469] print_req_error: I/O error, dev loop0, sector 1501550 flags 0 [ 115.775824] SQUASHFS error: squashfs_read_data failed to read block 0x2dd2d998 This also causes daily tests to fail and is reproducible in a VM and bare metal booted in legacy bios mode ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: casper 1.414 ProcVersionSignature: Ubuntu 5.2.0-10.11-generic 5.2.4 Uname: Linux 5.2.0-10-generic x86_64 ApportVersion: 2.20.11-0ubuntu7 Architecture: amd64 CasperVersion: 1.414 CurrentDesktop: ubuntu:GNOME Date: Wed Aug 14 08:31:30 2019 LiveMediaBuild: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190813) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=C.UTF-8 SHELL=/bin/bash SourcePackage: casper UpgradeStatus: No upgrade log present (probably fresh install) --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu7 Architecture: amd64 CasperVersion: 1.414 CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 19.10 LiveMediaBuild: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190814) Package: linux PackageArchitecture: amd64 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=C.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 5.2.0-10.11-generic 5.2.4 Tags: eoan Uname: Linux 5.2.0-10-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 1788 F.... pulseaudio CasperVersion: 1.414 CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 19.10 IwConfig: lo no wireless extensions. ens3 no wireless extensions. LiveMediaBuild: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190814) Lsusb: Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU USB Tablet Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=C.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: file=/cdrom/preseed/username.seed initrd=/casper/initrd --- keyboard-configuration/layoutcode=fr keyboard-configuration/variantcode=oss ProcVersionSignature: Ubuntu 5.2.0-10.11-generic 5.2.4 RelatedPackageVersions: linux-restricted-modules-5.2.0-10-generic N/A linux-backports-modules-5.2.0-10-generic N/A linux-firmware 1.181 RfKill: Tags: eoan Uname: Linux 5.2.0-10-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: 1.12.0-1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-disco dmi.modalias: dmi:bvnSeaBIOS:bvr1.12.0-1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-disco:cvnQEMU:ct1:cvrpc-i440fx-disco: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-disco dmi.sys.vendor: QEMU --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 1788 F.... pulseaudio CasperVersion: 1.414 CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 19.10 IwConfig: lo no wireless extensions. ens3 no wireless extensions. LiveMediaBuild: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190814) Lsusb: Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU USB Tablet Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) Package: linux-image-5.2.0-10-generic 5.2.0-10.11 PackageArchitecture: amd64 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=C.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: file=/cdrom/preseed/username.seed initrd=/casper/initrd --- keyboard-configuration/layoutcode=fr keyboard-configuration/variantcode=oss ProcVersionSignature: Ubuntu 5.2.0-10.11-generic 5.2.4 RelatedPackageVersions: linux-restricted-modules-5.2.0-10-generic N/A linux-backports-modules-5.2.0-10-generic N/A linux-firmware 1.181 RfKill: Tags: eoan Uname: Linux 5.2.0-10-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: 1.12.0-1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-disco dmi.modalias: dmi:bvnSeaBIOS:bvr1.12.0-1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-disco:cvnQEMU:ct1:cvrpc-i440fx-disco: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-disco dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1840122/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp