Here maybe I should put our revolution into European context, however it's a large ass topic, would be overkill, and I know very little about it so much research would be needed. Let's downsize the scope for a quick(ish) note.
The Spring of Nations run through Europe, got the Habsburg court (ruled by kanzler Metternich instead emperor and king Goodinand the bit simple) unprepared. They had troubles in Italy, but got into a long winded tug-of-war with the Viennese people, who also demanded social, economical, political changes. By the time the court decided to quench the Hungarian aspirations with arms and sent Jelacic into Hungary, the Viennese were already over two revolutions.
The Habsburg camarilla had enough confidence in Jelacic and the news that he was beaten at Pákozd in late September traveled slow, Latour, the Minister of War wanted to send the troops stationed in Wien to Buda (no Budapest yet) as a reinforcement to the Croat general whom he believed to be victorious (they even appointed Jelacic as a governor of Hungary). But the people sympathized with the Hungarian cause and essentially wanted to sabotage the troop movements in early October. On the 6th again an armed rebellion erupted, the court fled to Olomoutz, and Latour was lynched. Oh well. A gentleman named Auersperg moar liek Auersperger amirite was trusted with the task of restoring order.