installation hangs with SQUASHFS error zlib_fs

[zipeppe]

Binary package hint: ubiquity

ubuntu 7.04 herd3

the installation process hangs at the boot time. The hardware is
correctly recognized, nevertheless the next message appears
(splash and quite mode disabled):

.
.
.
loop: loaded
[37.173779] SQUASHFS error: Unable to read cache block [270bf206:141e]
                       SQUASHFS error: zlib_fs returned unexpected result 0xFFFFFFFF
[37.173779] SQUASHFS error: Unable to read cache block [270bf206:141e]
                       SQUASHFS error: zlib_fs returned unexpected result 0xFFFFFFFF
[37.173779] SQUASHFS error: Unable to read cache block [270bf206:141e]
                       SQUASHFS error: zlib_fs returned unexpected result 0xFFFFFFFF
[37.173779] SQUASHFS error: Unable to read cache block [270bf206:141e]
                       SQUASHFS error: zlib_fs returned unexpected result 0xFFFFFFFF.
.
.

The iso' md5sum is correct and the image has been burnt at 4X.

[Vassilis Pandis (pandisv)]

Does the CD pass the integrity check in the boot menu? (Go to the menu that you get after the CD loads but before it starts booting, and run "Verify CD integrity")

[Colin Watson (cjwatson)]

Phillip, this seems like one for you.

[zipeppe (zipeppe)]

I forgot to mention the CD also pass the integrity check with no errors.

[Phillip Lougher (phillip-lougher)]

Hi,

These type of bugs are extremely hard to track down without more information. I have a couple of further questions.

1. You say the installation process hangs at boot time. Do you mean here that the liveCD fails to boot to the desktop? Alternatively, does the liveCD boot to the desktop, but only fail when the installer icon is clicked?

2. Are the Squashfs error messages always reproducible? Have you tried to install more than once? If so, have you got the Squashfs error messages every time you have tried to install?

Based on the answers to these questions, hopefully I'll be able to suggest someways to track this bug down.

[Phillip Lougher (phillip-lougher)]

To get some progress with this bug, can you download the latest Beta, and retest? This has a newer version of Squashfs with better error checking.

[Phillip Lougher (phillip-lougher)]

No response, despite repeated requests. Closing.

[James Payne (james-sonifex)]

I have also had this problem with a new Ubuntu 8.04 final ISO downloaded multiple times and burnt to several CD's finally installed OK using alternate install CD. At the recommendation of some people on Ubuntu forums tried all_generic_ide floppy=off irqpoll kernel parameter but still failed this was with ASrock and MSI motherboards.

The forum thread is here: http://ubuntuforums.org/showthread.php?t=765195&page=8

This problem appears to be ongoing.