dmesg - how to make boot sequence faster

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http://askubuntu.com – My system used to boot pretty fast when I first installed ubuntu almost one year ago, but now takes a lot more. I used dmesg to see if I could find anything and there seems to be a 35 second gap between entries, but I don't know what I'm supposed to do to fix that. Part of my dmesg output is here: [ 1.940788] Registered led device: mmc0:: [ 1.970100] mmc0: SDHCI controller on PCI [0000:05:00.1] using DMA [ 1.970152] sdhci-pci 0000:05:00.2: SDHCI controller found [197b:2391] (rev 90) [ 1.970181] sdhci-pci 0000:05:00.2: Refusing to bind to secondary interface. [ 2.003943] usb 2 (HowTos)