On Fri, May 15, 2020 at 17:16:57 +0200, Michal Privoznik wrote: > On 5/15/20 4:40 PM, GUOQING LI wrote: [...] > > *Detailed error * > > Error starting domain: internal error: process exited while connecting > > to monitor: 2020-05-15T14:19:06.033267Z qemu-system-x86_64: -drive > > file=/usr/share/OVMF/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on: > > Failed to lock byte 100 > > > > This error message comes from QEMU. Unfortunately, it doesn't say why > locking the file failed. Is there perhaps some additional info in the audit > log? IMO there's another qemu where the 'readonly=on' command line property or thus the <readonly> property in the XML is missing and thus it's opened in write mode. Readers are forbidden then.