Messages in this thread | | | Date | Sat, 05 May 2007 07:40:20 +0200 | From | Rafał Bilski <> | Subject | Re: cpufreq longhaul locks up |
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Jan,
Can You send output of x86info program and output of lspci command? Longhaul wasn't working for You since 2.6.18 right? I'm going to work now, but I will be available after 14:00 UTC.
If You have problem with longhaul+powersave there may be one thing related. When I started to change Longhaul it was causing lockups on Epia 800. I added transition protection. Helped, but not for long. After one or two hours machine locked up anyway. I found datasheet in Google and changed "disable BMDMA bit on PCI device" to northbridge support. Problem fixed. Somehow CLE133 chipset didn't like touching "BMDMA master" bits. Second: I didn't get answer from VIA why they are blocking ACPI C3 on CPU's faster then 1GHz. I don't know if it is standard practice and if Intel and AMD are doing it too.
Things worth checking: disable PREEMPT, change it to "Voluntary preemption". Check if using conservative governor makes any difference. I know that this may sound strange, but transition latency is directly proportional to difference between current and destination frequency. Maybe for faster processors it isn't allowed to change frequency directly from min to max?
Rafał
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