Messages in this thread | | | Date | Mon, 01 Aug 2005 09:11:17 -0400 | From | Stephen Clark <> | Subject | 2.6.13rc4 hang |
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Hello List,
I am having a problem 2.6.13rc4 described below on a HP Pavilion N5430 laptop.
1) If I cold boot with only 'lacpi' to run level 3 - shortly after I get the login prompt the laptop freezes.
2) If I cold boot with 'lacpi acpi=off pci=noacpi,usepirqmask' the system boots and does not freeze but when I try to play sound I get no interrupts from my sound card.
3) If I now warm boot from step 2 with only 'lacpi' my laptop seems to be stable and I have sound.
I did this several times to try and really verify the above scenarios.
Diff between dmesg output from step 1 and step 3 $ diff dmesg104550 dmesg105029 43,45c43,44 < CPU: After generic identify, caps: 0183f9ff c1c7f9ff 00000000 00000000 00000000 00000000 00000000 < CPU: After vendor identify, caps: 0183f9ff c1c7f9ff 00000000 00000000 00000000 00000000 00000000 < Enabling disabled K7/SSE Support. --- > CPU: After generic identify, caps: 0383f9ff c1c7f9ff 00000000 00000000 00000000 00000000 00000000 > CPU: After vendor identify, caps: 0383f9ff c1c7f9ff 00000000 00000000 00000000 00000000 00000000 55c54 < ACPI: setting ELCR to 0200 (from 0800) --- > ACPI: setting ELCR to 0200 (from 0820) 92c91 < audit(1122734733.300:1): initialized --- > audit(1122735011.179:1): initialized 161c160 < Detected 849.810 MHz processor. --- > Detected 850.192 MHz processor. 163c162 < powernow: Minimum speed 299 MHz. Maximum speed 849 MHz. --- > powernow: Minimum speed 300 MHz. Maximum speed 850 MHz.
What is the best way to debug a hang? I there a way to turn on verbose debugging at boot? Also why would the hardware capabilities be different between a cold boot and a warm boot?
Thanks for any advice, Steve
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