Here's the error I get with git master when compiling on an older Thinkpad X41: pulsecore/core-util.c: In function ?pa_running_in_vm?: pulsecore/core-util.c:3087: error: can't find a register in class ?BREG? while reloading ?asm? pulsecore/core-util.c:3087: error: ?asm? operand has impossible constraints Is this code supposed to work across all x86 versions? Thanks - Pierre