On 2011-04-11 19:21, Stefan Weil wrote: > Am 11.04.2011 09:36, schrieb Paolo Bonzini: >> On 04/10/2011 08:28 PM, Stefan Weil wrote: >>> Commit 68c23e5520e8286d79d96ab47c0ea722ceb75041 removed the >>> multimedia timer, but this timer is needed for certain >>> Linux kernels. Otherwise Linux boot stops with this error: >>> >>> MP-BIOS bug: 8254 timer not connected to IO-APIC >>> >>> So the multimedia timer is added again here. >> >> Which distribution and Windows version is that? Also, have they tried >> the non-dynticks timer (win32)? >> >> Paolo > > The bug was reported for a tinycore 3.5.1 guest (linux kernel 3.6.33-3). > The iso image is available from > http://distro.ibiblio.org/tinycorelinux/3.x/release/. > QEMU was running on XP SP3. > > Other Linux live CD-ROMs (e.g. FC14) were reported to show the same bug > when run as guest. > > APIC can be disabled (kernel parameter), without APIC there is no problem. > > I see the same bug here with two XP hosts and also tried both timer > variants > of current QEMU (without a difference). > > I don't get the bug when running on a Linux host using wine.
Passing no_timer_check to the Linux guest should work around the issue as well. But this feature is only available since 2.6.20 (excluding popular legacy 2.6.16 kernels). Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux
