[Bug 1868348] Re: Clean install, installer crashed after disk partitioning set up

2020-03-26 Thread Chris Guiver
FYI:   The 20.04 ISOs perform validation automatically.

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Title:
  Clean install, installer crashed after disk partitioning set up

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[Bug 1868348] Re: Clean install, installer crashed after disk partitioning set up

2020-03-26 Thread Smittie
Chris Guiver's assessment is correct. I'm embarrassed that I did not run
an MD5 check before attempting to install. It did not occur to me that
the ISO might be bad until quite a while after the first occurrence of
the error.

I think it is worth pointing out that I was able to create a bootable
USB drive, boot from that drive and use Ubuntu from that drive. It was
not until attempting to install Ubuntu that the corruption became
evident. So, it was non-intuitive that the ISO might be bad. After all,
I was running on a drive created from the ISO.

I have enough experience on linux, Ubuntu and SWQA that I should have
caught this sooner than I did. However, as the Ubuntu user base expands
and as Ubuntu strives to compete with Windows and Mac OSX, this issue is
going to cause a lot of frustration for less experienced users.

My suggestion is that Ubuntu Startup Creator run an MD5 check on the ISO
before proceeding with the creation of the USB drive. Whether it offers
a warning or simply refuses to create the bootable USB drive is for the
UX geeks to decide.

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Title:
  Clean install, installer crashed after disk partitioning set up

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[Bug 1868348] Re: Clean install, installer crashed after disk partitioning set up

2020-03-26 Thread Smittie
The ISO did not pass an MD5 check and the USB that was used to produce
the failure was also used to complete the install using an ISO that
passed the MD5 check. I should have included this in my previous
comment.

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Title:
  Clean install, installer crashed after disk partitioning set up

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[Bug 1868348] Re: Clean install, installer crashed after disk partitioning set up

2020-03-20 Thread Chris Guiver
Thank you for taking the time to report this issue and helping to make
Ubuntu better.

This package failure looks like it was caused by bad ISO download,
corrupted install media, or device failure. eg. look in the logs and
you'll see messages like these :-

Mar 20 23:28:28 ubuntu kernel: [   77.872314] SQUASHFS error: zlib 
decompression failed, data probably corrupt
Mar 20 23:28:28 ubuntu kernel: [   77.872317] SQUASHFS error: 
squashfs_read_data failed to read block 0x366e47fe

Examining the information you have given us, this does not appear to be
a useful bug report so I am closing it, as it appears to be a bad ISO or
faulty device (inc. bad write-to-device). If you believe I'm in error,
please leave a comment explaining why and change the status back to
'New'. I suggest you verify your ISO download, and use the 'check disc
for defects' option to validate your media before install to ensure a
good download & write.

Possibly useful : https://tutorials.ubuntu.com/tutorial/tutorial-how-to-
verify-ubuntu#0 and
https://help.ubuntu.com/community/Installation/CDIntegrityCheck  (where
CD refers to your install media, be it CD, DVD, HDD, SSD, thumb-drive
etc)

** Changed in: ubiquity (Ubuntu)
   Status: New => Invalid

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Title:
  Clean install, installer crashed after disk partitioning set up

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