Although the reproducibility is non-constant, Bisecting shows the seabios commit b3fa8577 "kvm: add support for reading tsc frequency" is the most suspicious one to trigger below error message: cpage out of range (5) processing error - resetting ehci HC I used to say 'I indeed experenced the "processing error - resetting ehci HC" error message once"' with seabios 1.12, But that one was not triggered by "cpage out of range (5)" @Fabian, Could you please help to verify below workaround? Modify the test script on openQA to inject "no-kvmclock" kernel-parameter to related boot entry in guest grub. Thanks