/srv/irclogs.ubuntu.com/2007/05/11/#ubuntu-laptop.txt

popeylast comment on bug 112104 specifically12:09
mjg59popey: Like I said, the lack of throttling isn't a problem12:49
mjg59So regardless of anything else, the bug is mistitled :)12:50
popeyheh12:50
popeysuggestions welcome then12:51
mjg59But yeah, the scaling stuff looks utterly funted12:53
mjg59What hardware is this?12:53
popeytosh tablet laptop12:53
mjg59Other than that, the failures are fairly harmless12:53
mjg59Does Windows scale it correctly?12:53
popeyit doesnt feel quick though12:54
popeydunno, dont use windows12:54
mjg59Right, the scaling brokenness is probably killing performance12:54
mjg59If you run something cpu intensive, do the values in /proc/cpuinfo rise?12:54
popeyit always sits at 2GHz12:55
popeynever changes12:55
mjg59Yeah, that's fucked12:55
popeymy apologies if i disappear.. on ropey wifi at UDS12:55
mjg59Also, don't use powernowd directly - the init script should just be setting up ondemand and leaving it up to the kernel12:56
popeyok12:56
mjg59Can you try unloading speedstep_centrino and load acpi-cupfreq instead?12:56
popeysure12:57
popeyspeedstep_centrino isnt currently loaded12:57
mjg59...12:57
mjg59Ok, so that's a pretty poor sign to begin wth12:57
popeyacpi_cpufreq is12:57
mjg59Ok, that might explain it12:57
mjg59In that case, try unloading acpi-cpufreq and load speedstep-centrino12:57
popeyok12:58
popeyFATAL: Error inserting speedstep_centrino (/lib/modules/2.6.20-15-generic/kernel/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.ko): No such device12:58
mjg59Anything appear in dmesg then?12:58
popeyno, but I get a lot of these all the time:-12:58
popey[ 5424.824000]  APIC error on CPU0: 40(40)12:59
popey[ 5424.824000]  APIC error on CPU1: 40(40)12:59
mjg59Ok. I think you'll need to work with Ben to figure out why speedstep-centrino isn't working. In theory, the acpi_cpufreq stuff should work.01:00
popeyheh, spoke to ben the other day, he said "it's broken"01:00
mjg59Well, that's the obvious conclusion01:00
popeywell, actually said "sounds liek hardware failure"01:00
mjg59What was the bios option that you changed actually called?01:01
popeysorry, can't remember, it was something about cpu scaling01:01
popeybut not the word scaling01:01
popeywill check in the morning when i reboot01:02
mjg59It may be that that needs to be enabled01:02
popeyis this the kind of thing that might be fixed by a bios update or is it more likely to be a kernel thing do you think?01:02
mjg59Sounds like a bios thing01:02
popeyok, will re-enable when i boot in the morning and try the speedstep_centrino module, thanks01:03
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popeymeh, couldn't waity01:11
popeyit is called "Dynamic CPU Frequency Scaling" - I had it set to "Always high", now it is "Dynamically Switchable"01:11
mjg59Ok01:11
popey(last option is "always low")01:11
mjg59"Dynamically Switchable" sounds like the right value01:12
popeycpuinfo says 1GHz01:12
mjg59Ok. If you do something that loads the CPU (like dd if=/dev/zero of=/dev/null) does that rise?01:12
popeyalan@mother:/proc/acpi/processor/CPU0$ cat throttling01:12
popey<not supported>01:12
popeyone mo01:12
popeyyes01:13
popeycpuinfo says 2GHz now01:13
mjg59Ok. So that works.01:13
mjg59throttling isn't the same thing as frequency scaling01:13
popeyand back to 1Ghz01:13
popeyah, ok01:13
mjg59Throttling just drops the clock rate of the processor. It doesn't drop the voltage. As a result, it's entirely useless for anything other than emergency limitation, and even then scaling is preferable.01:14
popeyright01:14
mjg59So don't worry about the lack of throttling01:14
popeywilco01:14
mjg59Based on your descriptions, everything now sounds fine except for the oddly low performance01:14
mjg59Which is somewhat trickier to track down...01:15
mjg59Your laptop probably has less cache than the desktop machine, but I would expect that to make a huge difference in the case you're describing01:15
popeykind of a bummer when i was hoping to do some cpu intensive stuff with this thing :(01:15
mjg59I'd recommend some more solid benchmarking01:15
popeyok, the unix bench thing?01:16
popeyByte Unix Benchmark01:16
mjg59For instance01:16
mjg59I've never done any heavy CPU benchmarking, so...01:16
popeyhttp://hants.lug.org.uk/cgi-bin/wiki.pl?ByteUNIXBenchmark is the kind of thing01:16
popeywhich seems relatively comprehensive01:17
popeythanks for the time spent on this mjg59, another beer in the nudge bank01:19
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FahuadaiI have heard that 7.04 has inproved support for broadcom wireless cards including the bcm43** series. I've been trying for a while to get wpa2 working on a university network with no luck so far.12:58
Fahuadaiwould upgrading to 7.04 help?12:59
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elcucohi06:53
elcucoI am using Kubuntu 6.10 (in 2 hours 7.04) on a Lenovo 3000 N100, and found this site:06:54
elcucohttps://wiki.ubuntu.com/LaptopTestingTeam/Lenovo3000N10006:54
elcucosome things are not exactly corrent in that wiki page.06:55
elcucofor example external monitor did not work for me on the 7.04 livecd06:55
elcucoscreen is not detected out of the box (915 resolution)06:55
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crimsunelcuco: you need to use xserver-xorg-video-intel, of coure.08:46
crimsuncourse ^08:46
crimsunforget xserver-xorg-video-i810 + 915resolution08:46
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peterkaHi11:47
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