Public bug reported:
Binary package hint: mythtv
Using Ubuntu 8.04 mythbackend crashes consistently with SIGILL a few
seconds after being started. It seems that it uses a cmov instruction
which is not supported on my CPU (VIA Nehemiah ME6000). Previous
versions of mythtv (pre 8.04) worked flawlessly. This seems related to
bug #198104, except now for a different instruction.
The Right Solution® seems to do as suggested comment 8 of bug #198194:
have two versions of mythtv one for every supported CPU, and an
optimized version.
Program received signal SIGILL, Illegal instruction.
[Switching to Thread 0xb52b9b90 (LWP 22545)]
0x080ffd1f in ?? ()
(gdb) bt
#0 0x080ffd1f in ?? ()
#1 0x081036fa in ?? ()
#2 0x0810463f in ?? ()
#3 0xb5d2afda in start_thread () from /lib/libpthread.so.0
#4 0x00000002 in ?? ()
#5 0x00000002 in ?? ()
#6 0x00000002 in ?? ()
#7 0xb52b9410 in ?? ()
#8 0x00000000 in ?? ()
(gdb) x/i $pc
0x80ffd1f: cmovns 0xac(%esp),%edx
[EMAIL PROTECTED]:/share# cat /proc/cpuinfo
processor : 0
vendor_id : CentaurHauls
cpu family : 6
model : 7
model name : VIA Samuel 2
stepping : 3
cpu MHz : 599.925
cache size : 64 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu de tsc msr cx8 mtrr pge mmx 3dnow up
bogomips : 1201.56
clflush size : 32
[EMAIL PROTECTED]:/share# apt-cache policy mythtv
mythtv:
Installed: (none)
Candidate: 0.21.0+fixes16838-0ubuntu3
Version table:
0.21.0+fixes16838-0ubuntu3 0
500 http://no.archive.ubuntu.com hardy/multiverse Packages
** Affects: mythtv (Ubuntu)
Importance: Undecided
Status: New
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mythbackend crashes with SIGILL on VIA cpu
https://bugs.launchpad.net/bugs/230191
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