Hello,
I made a bootable usb key with the GPD Pocket 1 version of Ubuntu Mate 18.04 LTS in order to install it on my GPD Pocket 1. While booting on the key I first chose to check if the ISO had no error, but after the test ran it returned that 3 files did not match (not saying which ones)
I created the bootable key again, and got the exact same flag again.
Please note that I had checked the sha256sum of the downloaded ISO and it matched.
Why is that ?
Thank you.
I don't know why this error occurs. I used the Startup USB utility to create a boot disk of the GPD Pocket 18.04 iso and when booting, I checked the iso for errors. It returned "Check finished: errors found in 3 files!"
This was the first time in quite a while that I bothered to check any iso in this fashion. FWIW.
What are the changes you applied to Ubuntu Mate to make it suitable for the GPD ? Is your process reproducible from the sources ? I would like to give it a try.
And thank you so much for making this !!!
I did not make the GPD version nor any version at all. You'll have to ask others. I merely confirmed your experience.
Oh sorry, I misunderstood you 
I always use every step of verification with new software, especially with softwares as critical as an OS.
Difficult to trust it with these 3 files gone bad...
(and for me the 19.04 version simply don't work)
For the record, I made my bootable usb key using the dd command from the terminal, result is the same as yours.
They're not corrupt files, the build script must not be correctly updating the hashes. Which files are failing verification?
How would one know? I only saw that 3 files had errors.
Hello Wimpy, you are probably right, but this is not a normal safe behaviour for a checking script : "3 errors" means there are problems. The error message does not specify which files are problematic. Try it yourself : it seems that everybody gets the same error message upon checking.
I am interested in the building process : are you using some ubuntu remix tool ? Where can I find this build script specialized for GPD Pocket ?
Thank you
Hello, I am totally new here and have observed a similar problem as zovopecule.
In my case the GPD Pocket broke during install of Mate 18.04 and checking the syslog there was several rows with:
... ubuntu-mate kernel: [ 65.581224] SQUASHFS error: zlib decompression failed, data probably corrupt
... ubuntu-mate kernel: [ 65.581236] SQUASHFS error: squashfs_read_data failed to read block 0x67b3cbf8
I then made a script checking all files created on the USB installer by "Create Startup Disk" with the downloaded ISO which had correct checksum.
What I found was this:
######## FAILED md5sum ########
/media/igor/Ubuntu-MATE 18.04.2 gpd-pocket/isolinux/boot.cat
Expected: 72acd44f7e3fed1255a120b1e053f2c8
Actual : 0563a286d4437d87a43bbcb1a1a9de5e
---------------------------------------------------------------
######## FAILED md5sum ########
/media/igor/Ubuntu-MATE 18.04.2 gpd-pocket/isolinux/isolinux.bin
Expected: e6ac582d1fce36959688edc086c190b3
Actual : 867552f76d9d0527f85ccbb2f7b450a7
---------------------------------------------------------------
######## FAILED md5sum ########
/media/igor/Ubuntu-MATE 18.04.2 gpd-pocket/boot/grub/efi.img
Expected: 455a6a2009efdbc3b479aa201e857b62
Actual : 1b5bf937583468d3980ebfc05da9ba98
---------------------------------------------------------------
######## FAILED md5sum ########
/media/igor/Ubuntu-MATE 18.04.2 gpd-pocket/md5sum.txt
Expected: edbe5c1a8f7241cc5897b8928902510a
Actual : 11f8a9f4fcb598e0e3508dc43d4963e6
---------------------------------------------------------------
######## FAILED md5sum ########
/media/igor/Ubuntu-MATE 18.04.2 gpd-pocket/casper/filesystem.squashfs
Expected: 80b07d11c7c729d7756272bd0d2c2773
Actual : e68e5f1ae08c6143cb0368be29029b5d
---------------------------------------------------------------
I can probably with some effort get back to the old Ubuntu 16.04 version but I think I would like to have the Mate 18.04 working on the GPD instead.