Downloaded images failed checksum validation

[Corentin]

Hello,
When the dowload is finish he said "Downloaded images failed checksum validation" and i've try different checksum and that's the same problem

[Chris Van Hoof (vanhoof)]

Hello -- Are these from a recent download? Can you contents of the ubuntu-nexus7-sha256sum.txt file in ~/Downloads/UbuntuNexus7 ?

--chris

[Chris Wayne (cwayne)]

Hi Corentin,

The best option right now would be to re-download it. It's possible you got a partial download while we were updating the image. Simply say "No" when it asks to re-use the same download. If this doesn't work, please reopen the bug. Thanks for taking the time to log this bug to help improve Ubuntu on the Nexus 7!

[Stephen Cooper (stecooper)]

I am having the same issue and have had for about the last 5 hours, I thought it was because I was running Ubuntu in Virtualbox but I have tried on a normal install and I get the same issue.

[planis (planis893)]

I am also having the same issue

[Corentin (corentin-dehay)]

i re-download but now the app is crashing , it pass very quickly download and say " checksum downloaded failed images validation " again

[Corentin (corentin-dehay)]

and when i download manually image from the website hwe.ubuntu.com it say failed with checksum

[Matt Fischer (mfisch)]

Confirmed by hggdh.

[XYunknown (kgreshake)]

Got a temporary solution: Download the files with the Installer, and if the error message occurs, close the installer. Then open the Download dir in the terminal with "cd ~\>>Download Dir here<<\UbuntuNexus7" . Then execute "sha256sum rootfs.img" (I do not remember the exact filename) and replace the code you get with the code in the text file in the folder. But be aware that if the download is really corrupted it can be dangerous.. But it worked for me. I assume they just didn't update the sha-checksum on the server. Then open up the installer again and agree to the re-use popup.

[Chris Van Hoof (vanhoof)]

Marking this as fix committed for now but there was a server side cache issue and we also updated the installer logic to be a bit smarter about dealing with potential cache issues. Version 1.5 of the installer is now published:

https://launchpad.net/~ubuntu-nexus7/+archive/ubuntu-nexus7-installer

Please let me know if you see the same checksum failures after this update.

--chris

[Chris Van Hoof (vanhoof)]

Please re-open if you run into any issues!

[C de-Avillez (hggdh2)]

Checked the new installer -- it either downloads the correct images, or checks that they are up-to-date. I could not reproduce the issue (but, then, I had already checked that '--no-cache' and '-N' would do the trick).

[Eric Zig (zuric)]

I upgraded the installer but I still a checksum failure

[Eric Zig (zuric)]

It's work, since I redownload the ISO

[Chris Van Hoof (vanhoof)]

On 11/09/2012 05:59 PM, Eric Zig wrote:
> It's work, since I redownload the ISO

Great to hear; thanks for testing Eric!

[Corentin (corentin-dehay)]

always the same problem and he pass very quickly the donwload and download nothing now and say checksum failed

[Corentin (corentin-dehay)]

For checksum failed we must have to reboot Pc
But for the download he does nothing

[Corentin (corentin-dehay)]

i put files manually in the folder and now it's seems to work , i tell you if it's working after he finish !

[Corentin (corentin-dehay)]

so he can't download anything and he stuck on erasing boot

[Corentin (corentin-dehay)]

and i don't know why but after 4 pc reboot nexus 7 ubuntu installer is working !

[Christopher M. Rogers (cajhne)]

The problem seems to be the SHA256SUMS file. The checksums match, so all you need to do is open the downloaded SHA256SUMS file in a text editor, and replace all the * characters with space characters, and erase the two entries for files that were not downloaded with the package. That should fix the issue (at least it did for me). Hope that helps!

Source: I ran sha256sum checksums on both files (raring-preinstalled-desktop-armhf+nexus7.bootimg and raring-preinstalled-desktop-armhf+nexus7.img.gz) and they match what's in the file SHA256SUMS, minus the * characters, so I just erased the * characters, and all other lines after the first two. It worked, so it's likely a parsing error in the installer, possibly to do with the * characters, and possibly to do with the lines for checksums for files that were not included in the download.