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| | ==Kernel patches== | | ==Kernel patches== |
| − | ====Dothan CPUs and speedstep====
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| − | If you have a new Dothan CPU (Centrino with 2Megs of L2 cache) and kernel 2.6.8, then you will need to apply [http://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.8-rc3/2.6.8-rc3-mm1/broken-out/bk-cpufreq.patch this patch] and [http://gort.metaparadigm.com/cpufreq/cpufreq-speedstep-dothan-3.patch this one], too. Otherwise speedstep will not work on your Dothan CPU.
| + | [[Dothan speedstep patch]] <<t>(enables speedstep on dothan processors)</tt> |
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| − | ====ipw2100 and C3====
| + | [[no-C3 patch | no-C3 patch for IPW2100]] <tt>(use this if you experience frequent firmware restarts)</tt> |
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| − | On some Thinkpads there is a problem with the ipw2100 wireless LAN driver when C3 is enabled. It results in frequent firmware restarts due to data corruption. If you see this problem frequently and want to disable C3 but still use C2 and the thermal management, you can apply [http://fionn.de/no-c3.patch this] patch to the file <tt>/usr/src/linux/drivers/acpi/processor.c</tt>.<br>
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| − | <tt>APPLY THIS PATCH ONLY IF YOUR SYSLOG REPORTS DRIVER RESTARTS AND FIRMWARE RELOADS ALL THE TIME!</tt><br>
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| − | This patch causes slightly shorter battery life.
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| − | If you don't want to patch your kernel, sacrifice C3 entirely and/or use WLAN mainly on AC then you can alternatively add rules to modules.conf to unload the acpi processor module as long as ipw2100 is loaded.
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Revision as of 22:24, 26 September 2004
Information on patches for existing Thinkpad tools and drivers or to adopt others to work with Thinkpads.
Kernel patches
Dothan speedstep patch <<t>(enables speedstep on dothan processors)
no-C3 patch for IPW2100 (use this if you experience frequent firmware restarts)
