On 28/03/2015 20:19, Mark Cave-Ayland wrote: > On 28/03/15 19:04, BALATON Zoltan wrote: > >> Hello, >> >> Commit c3c1bb99d1c11978d9ce94d1bdcf0705378c1459 (exec: Respect >> as_tranlsate_internal length clamp) seems to break vga output with >> qemu-system-ppc on x86_64 host. Since this commit, the output window >> does not get to the OpenBIOS console but stays black. (Easy to reproduce >> by just starting qemu-system-ppc.) >> >> The reason may be that this change has exposed another bug somewhere >> else but this is all quite obscure to me. Does anyone have any idea what >> could be wrong or where to look further. Any help is appreciated. > > Hi Zoltan, > > Yes indeed, this has been picked up in the last few days and is on the > list of issues to be dealt with for -rc2. So watch this space...
This is an OpenBIOS bug; the port at 0x1ce is 1 byte wide, but OpenBIOS is accessing it as 2 bytes. Of course, there's a QEMU regression too and I'm thinking of how to fix it. Paolo
