Very slow boot and what is hpet1

[edyp87]

Hello,

I’ve got a problem with very slow Ubuntu 12.10 boot on my Asus laptop. It just hangs on for two minutes after grub . After these two minutes everything is working fine. This problem occurs since Ubuntu 10.10, 10.04 is working fine.

I can see these entries in dmesg:

[ 10.280717] [<c15d1c7e>] ? kernel_thread_helper+0x6/0x10
[ 10.280724] ---[ end trace b1793aea6dcc568d ]---
[ 149.816216] hpet1: lost 117715576 rtc interrupts
[ 149.816236] INFO: rcu_sched self-detected stall on CPU { 0} (t=37231 jiffies)

Can you tell me what is the source of this issue and how can I solve it?

[rnerwein]

Hello,

I’ve got a problem with very slow Ubuntu 12.10 boot on my Asus laptop. It just hangs on for two minutes after grub . After these two minutes everything is working fine. This problem occurs since Ubuntu 10.10, 10.04 is working fine.

I can see these entries in dmesg:



Can you tell me what is the source of this issue and how can I solve it?

hi
about your question: 3 * 9 = google

cheers

[2F4U]

HPET is a hardware timer:

http://en.wikipedia.org/wiki/High_Precision_Event_Timer

The dmesg output is kind of useless because it has no timestamps. I would suggest you get the part from syslog that covers the hang and hopefully this shows on what it is waiting.

[edyp87]

Thanks for your reply.

The dmesg output is kind of useless because it has no timestamps.

Timestamps are included between brackets in dmesg output.
Thanks for your answer about hpet. I've added "hpet=disable" option to grub2 config file and I am testing it now. I think that it boots without problems now.