On 02.08.2012, Georgios Petasis wrote: > So, this is a processor bug? I would expect that Linux should detect these > automatically... If I remember all correctly, there were two mainly independend issues with C1E in Linux, one which is processor-related, and one BIOS-related. Processor-bugs are adressed by loading fixes via microcode updates at boot-time. Check your dmesg output if this is the case with your CPU. There should be something like that (laptop with i5 cpu): [root@wildsau ~]# dmesg | grep microcode microcode: CPU0 sig=0x20655, pf=0x10, revision=0x2 microcode: CPU0 updated to revision 0x3, date = 2011-09-01 microcode: CPU1 sig=0x20655, pf=0x10, revision=0x2 microcode: CPU1 updated to revision 0x3, date = 2011-09-01 microcode: CPU2 sig=0x20655, pf=0x10, revision=0x2 microcode: CPU2 updated to revision 0x3, date = 2011-09-01 microcode: CPU3 sig=0x20655, pf=0x10, revision=0x2 microcode: CPU3 updated to revision 0x3, date = 2011-09-01 microcode: Microcode Update Driver: v2.00 <tigran@xxxxxxxxxxxxxxxxxxxx>, Peter Oruba > So, my AMD 920 cpu is not only slow, it has also some errata incompatible > with Fedora. Nice :D Nearly all CPUs have errata :-) The problem you encounter is not a Fedora one, it's most likely a BIOS-problem, or the E400 routines in the kernel doesn't get triggered by your hardware. It's impossible for me to see where the problem finally originates in your case. The AMD people are generally cute ones and really interested in such thing, so if you care to dig into this further, you could consider mailing Borislav Petkov directly (borislav.petkov@xxxxxxx). If I remember that right, there was a fix pending around april/may 2011 for this, and a quick look into process.c shows that the E400 case is taken care of by the kernel. Look into your dmesg output and boot.log (and other logfiles: /var/log/messages etc.) for "AMD E400 aware idle routine" or something similar/related. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
