I have an AMD Ryzen processor. Last night (10-10-2021) I used the Leap 15.3 x86_64 version offline image (upper left hand side of the pane) and burned to iso to USB (Imagewriter) and DVD (Brasero).
When updating was all done the upgrade to 15.3 failed to boot. I tried both USB (twice) and DVD, same result. I can boot through the green bar to boot into 15.3, choose it and then after that the boot stalls to oblivion.
Fortunately I backed up my Leap 15.2 system drive completely or I would be SOL.
Last night (10-10-2021) I used the Leap 15.3 x86_64 version offline image (upper left hand side of the pane) and burned to iso to USB (Imagewriter) and DVD (Brasero).
What “pane”?
When updating was all done the upgrade to 15.3 failed to boot. I tried both USB (twice) and DVD, same result. I can boot through the green bar to boot into 15.3, choose it and then after that the boot stalls to oblivion.
You haven’t provided much to go on. Are both 15.2 and 15.3 installed? Without 15.3 installed, you can’t collect information needed for troubleshooting what went wrong. When you have a problem like this, hitting ESC while the useless graphic is onscreen will switch from the useless graphic to messages that may provide clues to what is and isn’t happening.
All my upgrades are done online using zypper. I have more than 20 15.3 installations working just fine. Most are zypper upgrades from 15.2 or older.
I had a system hard drive with only Leap 15.2 on it and no other OS. Due to past battles of yore the system drive had 6 partitions. One of those (/dev/sda1) was a legacy bad boot partition.
Modern Leap 15.3 now seems to run on 3 explicit partitions (boot, home, swap). Apparently the delta between 3 partitions and my 6 partitions was just too much to handle for using the USB stick .iso to upgrade Leap 15.2 to 15.3. (I also learned to use zypper to upgrade but that failed to boot as well.)
I ended up doing a fresh install of Leap 15.3 from the USB stick with a Leap 15.3 .iso on it.
It was work to re-install apps etc. but Leap 15.3 boots and various aspects are much improved. Boot time is much reduced. Yes, I truly believe in backups. I also believe in a separate drive for user files which includes a backup of my home directory.
A great joy of the fresh 15.3 install will be future use of zypper for further version upgrades.
Thanks
FWIW 1: AMD Ryzen Threadripper 1950X
FWIW 2: “Pane” refers to the openSUSE download site page, where you choose the appropriate version of Leap 15.3
FWIW, this is where I go for Leap downloads: http://download.opensuse.org/distribution/leap/
And for TW downloads: http://download.opensuse.org/tumbleweed/
I use wget to fetch, to ensure the timestamp on the file saved locally matches that on the server from which fetched, so there’s no confusion whether a file on the mirrors matches the one I saved or is newer.