There hasn't been a reply to my question in the last comment within
months, so I assume nobody cares about this anymore. So I'm closing this
ticket now...
** Changed in: qemu
Status: Incomplete => Won't Fix
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Triaging old bug tickets ... can you still reproduce this problem with
the latest version of QEMU (v2.8)?
** Changed in: qemu
Status: Confirmed => Incomplete
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Note: this is already marked as FIXME in kvm-all.c:
if (run-internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
fprintf(stderr, emulation failure\n);
if (!kvm_arch_stop_on_emulation_error(env)) {
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
Yes, memory corruption in guest explains the unaligned/out of range
pointer error (issued when grub2 releases a block of memory, and grub
uses dynamic allocation quite a lot) and the boot loop. This corruption
most likely originates in the vga code fixed in revision 2470 as
reported in Bug
It turns out that my previous attempt to reproduce the vga crash using
an image generated by grub-mkrescue (which is easier to work with than
dealing with a full Ubuntu image) is invalid due to bad instrumentation
in the normal module init and a stack overflow produced similar
results including
See also LP#717445:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/717445
which is exactly the same issue but reported against grub. And I tend
to think more and more it is a grub bug after all, not qemu/kvm/bios
bug.
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and it still happens even in version 1.0
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https://bugs.launchpad.net/bugs/502107
Title:
qemu-kvm 0.12.1.2 crashes booting Ubuntu 9.10 with -vga std
Status in QEMU:
Confirmed
Bug
see also http://bugs.debian.org/616487 and http://bugs.debian.org/653068
- it appears this prob happens with grub with qxl (spice) and vmware
adaptors
** Bug watch added: Debian Bug tracker #616487
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=616487
** Bug watch added: Debian Bug tracker
Some notes of interest:
- the unaligned pointer error also seems to happen in real systems with certain
ATI cards.
- rebuilding grub with mm-debug makes Ubuntu boot without unaligned/out of
range pointer messages with -vga std.
- adding debug messages (with grub_printf()) to grub memalign/free
still not resolved: guest=Ubuntu 10.10, host=Fedora14
crashes with -vga std or -vga vmware
works with -vga cirrus
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https://bugs.launchpad.net/bugs/502107
Title:
qemu-kvm 0.12.1.2
PS: qemu-kvm -version = 0.13.0
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https://bugs.launchpad.net/bugs/502107
Title:
qemu-kvm 0.12.1.2 crashes booting Ubuntu 9.10 with -vga std
Status in QEMU:
Confirmed
Bug
PPS: Ubuntu 10.10 crashes also with qemu-kvm -vga qxl -spice ...
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https://bugs.launchpad.net/bugs/502107
Title:
qemu-kvm 0.12.1.2 crashes booting Ubuntu 9.10 with -vga std
Status in
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