Hi there!
Dont know really if it helps for your case, but I had the same problem ... infinite "undefined...success" at DB-Installation process
Because I remembered of a similar problem i had with a 4.x Version, i decided to wait a few minutes and after that i changed the url in the browser from
www.mydomain.at/Install/InstallWizard.aspx (where the infinite loop was still going on)
to
www.mydomain.at/default.aspx
For me, this solution worked. dnn started the upgrade process and commented with:
Upgrading DotNetNuke
Current Assembly Version: 05.01.02
Current Database Version: 05.00.00
Upgrade Status Report
00:00:00.046 - Upgrading to Version: 05.01.02
00:00:04.343 - Executing Script: 05.00.01.SqlDataProvider Success
00:00:10.124 - Executing Script: 05.01.00.SqlDataProvider Success
00:00:25.874 - Executing Script: 05.01.01.SqlDataProvider Success
00:00:29.733 - Executing Script: 05.01.02.SqlDataProvider Success
00:00:33.562 - Executing Application Upgrades: 05.00.01 Success
00:00:35.937 - Executing Application Upgrades: 05.01.00 Success
00:00:46.265 - Executing Application Upgrades: 05.01.01 Success
00:00:46.265 - Executing Application Upgrades: 05.01.02 Success
00:00:46.265 - Cleaning Up Files: 05.00.01 Success
00:00:46.311 - Cleaning Up Files: 05.01.00 Success
00:00:46.343 - Cleaning Up Files: 05.01.01 Success
00:00:46.343 - Cleaning Up Files: 05.01.02 Success
00:00:46.343 - Updating Config Files: 05.00.01 Success
00:00:46.343 - Updating Config Files: 05.01.00 Success
00:00:46.374 - Updating Config Files: 05.01.01 Success
00:00:46.374 - Updating Config Files: 05.01.02 Success
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I hope this helps
regards
don