Ubuuntu20.04启动不了，VMWare Workstation下再装失败
好久没折腾过Ubuntu，似乎还是疫情期间安装到现在，中途没用过几次，再打开时发现有问题了，提示信息如下
VMWare Workstation启动Ubuntu时的提示信息，可以通过设置BIOS中的设置项 Intel Virtual Technology = Enable 即可解决。
从Ubuntu12到20.04从来就没安装失败过，本次碰到这类问题，但还是不可启动 Ubuntu，安装时本次修改了选项兼容 SCSI类型也报错了，
Nov 27晚重装失败，Nov 28再装仍然是失败，暂时不想考虑安装用 ubuntu-21.10-live-server-amd64.iso，Nov 29重新下载一个新的*.iso文件再试。
These errors can be due to a variety of reasons:
- bad memory modules (solution: use memtest86+ to check your memory)
- a bad dvd drive (solution: if possible, try using a different cd/dvd drive)
- bad data cable (solution: change it for a new one)
- bad media (solution: try burning the iso image to a new disc)
- a corrupted iso image (solution: run an md5 checksum, and if they don't match, download the iso image again) --->>>文件坏了，更换*.iso文件后立即安装正常
SquashFS Errors
Problem Statement
Some users have reported being unable to boot from the Ubuntu LiveCD, due to SquashFS errors like this:
SQUASHFS error: sb_bread failed reading block 0x9d7f3SQUASHFS error: Unable to read fragment cache block [275faa28]SQUASHFS error: Unable to read page, block 275faa28, size 23a7
Example 2:
[ 1228.553598] EXT3 FS on sda5, internal journal[ 1228.553605] EXT3-fs: mounted filesystem with ordered data mode.[ 1349.994012] SQUASHFS error: zlib_inflate returned unexpected result 0xfffffffd, srclength 131072, avail_in 352, avail_out 92175[ 1349.994024] SQUASHFS error: sb_bread failed reading block 0x77162[ 1349.994029] SQUASHFS error: Unable to read fragment cache block [1dc4df1a][ 1349.994035] SQUASHFS error: Unable to read page, block 1dc4df1a, size a972
Example error when loading Xubuntu with Wubi on first boot:
[ 81.364872] Btrfs loaded[ 90.596351] Adding 261112k swap on /host/ubuntu/disks/swap.disk. Priority:-1 extents:1 across:261112k[ 104.800436] EXT4-fs (loop2): mounted filesystem with ordered data mode[ 288.909464] SQUASHFS error: zlib_inflate error, data probably corrupt[ 288.909481] SQUASHFS error: squashfs_read_data failed to read block 0x11b3773e[ 288.909490] SQUASHFS error: Unable to read data cache entry [11b3773e][ 288.909494] SQUASHFS error: Unable to read page, block 11b3773e, size 17512[ 288.909531] SQUASHFS error: Unable to read data cache entry [11b3773e][ 288.909534] SQUASHFS error: Unable to read page, block 11b3773e, size 17512[ 288.909557] SQUASHFS error: Unable to read data cache entry [11b3773e][ 288.909561] SQUASHFS error: Unable to read page, block 11b3773e, size 17512[ 288.909574] SQUASHFS error: Unable to read data cache entry [11b3773e][ 288.909578] SQUASHFS error: Unable to read page, block 11b3773e, size 17512[ 288.909591] SQUASHFS error: Unable to read data cache entry [11b3773e][ 288.909594] SQUASHFS error: Unable to read page, block 11b3773e, size 17512[ 288.909609] SQUASHFS error: Unable to read data cache entry [11b3773e][ 288.909612] SQUASHFS error: Unable to read page, block 11b3773e, size 17512[ 288.909626] SQUASHFS error: Unable to read data cache entry [11b3773e][ 288.909630] SQUASHFS error: Unable to read page, block 11b3773e, size 17512[ 288.909644] SQUASHFS error: Unable to read data cache entry [11b3773e][ 288.909647] SQUASHFS error: Unable to read page, block 11b3773e, size 17512[ 288.909664] SQUASHFS error: Unable to read data cache entry [11b3773e][ 288.909667] SQUASHFS error: Unable to read page, block 11b3773e, size 17512
Causes and Solutions
These errors can be due to a variety of reasons:
- bad memory modules (solution: use memtest86+ to check your memory)
- a bad dvd drive (solution: if possible, try using a different cd/dvd drive)
- bad data cable (solution: change it for a new one)
- bad media (solution: try burning the iso image to a new disc)
- a corrupted iso image (solution: run an md5 checksum, and if they don't match, download the iso image again)
Temporary Workarounds
Some users have reported that adding the ide=nodma or acpi=off allowed them to work around this issue (which proved to be bad memory modules). You might want to give that a try
Successful boot was achieved by adding "all_generic_ide" to the grub boot line for the live CD.
You can add those lines to the grub entry, either in the grub.conf file or either entering letter 'e' on the grub menu and after editing Control+x to boot:
Add to the grub line:
all_generic_ide pci=nommconf
Add to the kernel line:
ide=nodma acpi=off
More information about the problem in grub can be found here: https://bugs.launchpad.net/wubi/+bug/608941
If is not a HW problem and you can probe it
If you definitely found that is not a HW issue, add you comment with all the logs and evidence you can get to Launchpad bug #172937
