{"id":12073,"date":"2026-09-02T16:18:59","date_gmt":"2026-09-02T20:18:59","guid":{"rendered":"https:\/\/www.sayso.net\/?p=12073"},"modified":"2026-09-02T16:29:38","modified_gmt":"2026-09-02T20:29:38","slug":"converting-kvm-virt-manager-from-bios-to-uefi-boot","status":"publish","type":"post","link":"https:\/\/www.sayso.net\/?p=12073","title":{"rendered":"Win10: Converting KVM \/ virt-manager from BIOS to UEFI boot w\/TPM"},"content":{"rendered":"\n

After running mbr2gpt edit the System and replace the <os> section with:<\/strong>

\u00a0<os>
\u00a0\u00a0\u00a0\u00a0\u00a0<type arch=”x86_64″ machine=”q35″>hvm<\/type>
\u00a0\u00a0\u00a0\u00a0\u00a0<loader readonly=”yes” type=”pflash”>\/usr\/share\/OVMF\/OVMF_CODE_4M.ms.fd<\/loader>
\u00a0\u00a0\u00a0\u00a0\u00a0<boot dev=”hd”\/>
\u00a0<\/os>

When you start the machine, this section will be updated to this:<\/strong>

\u00a0<os firmware=”efi”>
\u00a0\u00a0\u00a0\u00a0\u00a0<type arch=”x86_64″ machine=”pc-q35-10.0″>hvm<\/type>
\u00a0\u00a0\u00a0\u00a0\u00a0<firmware>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<feature enabled=”yes” name=”enrolled-keys”\/>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<feature enabled=”yes” name=”secure-boot”\/>
\u00a0\u00a0\u00a0\u00a0\u00a0<\/firmware>
\u00a0\u00a0\u00a0\u00a0\u00a0<loader readonly=”yes” secure=”yes” type=”pflash” format=”raw”>\/usr\/share\/OVMF\/OVMF_CODE_4M.ms.fd<\/loader>
\u00a0\u00a0\u00a0\u00a0\u00a0<nvram template=”\/usr\/share\/OVMF\/OVMF_VARS_4M.ms.fd” templateFormat=”raw” format=”raw”>\/var\/lib\/libvirt\/qemu\/nvram\/win10.VARS.fd<\/nvram>
\u00a0\u00a0\u00a0\u00a0\u00a0<boot dev=”hd”\/>
\u00a0<\/os>

…and it just boots! At least on Debian 13 (Kanotix in this case)<\/strong><\/p>\n\n\n\n

As for TPM, you may get an error message when adding the hardware to the VM<\/strong><\/p>\n\n\n\n

Unable to add device: unsupported configuration: TPM version ‘2.0’ is not supported<\/p>\n\n\n\n

You’ll need to install supporting packages. Easy like this:<\/strong><\/p>\n\n\n\n

root@precision:~# apt install swtpm-tools
Installing: \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\u00a0swtpm-tools

Installing dependencies:
\u00a0gnutls-bin \u00a0libtpms0 \u00a0swtpm \u00a0swtpm-libs

Suggested packages:
\u00a0trousers

Summary:
\u00a0Upgrading: 0, Installing: 5, Removing: 0, Not Upgrading: 27
\u00a0Download size: 1,175 kB
\u00a0Space needed: 3,362 kB \/ 12.0 GB available

Continue? [Y\/n] Y

<\/p>\n","protected":false},"excerpt":{"rendered":"

After running mbr2gpt edit the System and replace the <os> section with: \u00a0<os>\u00a0\u00a0\u00a0\u00a0\u00a0<type arch=”x86_64″ machine=”q35″>hvm<\/type>\u00a0\u00a0\u00a0\u00a0\u00a0<loader readonly=”yes” type=”pflash”>\/usr\/share\/OVMF\/OVMF_CODE_4M.ms.fd<\/loader>\u00a0\u00a0\u00a0\u00a0\u00a0<boot dev=”hd”\/>\u00a0<\/os> When you start the machine, this section will be updated to this: \u00a0<os firmware=”efi”>\u00a0\u00a0\u00a0\u00a0\u00a0<type arch=”x86_64″ machine=”pc-q35-10.0″>hvm<\/type>\u00a0\u00a0\u00a0\u00a0\u00a0<firmware>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<feature enabled=”yes” name=”enrolled-keys”\/>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<feature enabled=”yes” name=”secure-boot”\/>\u00a0\u00a0\u00a0\u00a0\u00a0<\/firmware>\u00a0\u00a0\u00a0\u00a0\u00a0<loader readonly=”yes” secure=”yes” type=”pflash” format=”raw”>\/usr\/share\/OVMF\/OVMF_CODE_4M.ms.fd<\/loader>\u00a0\u00a0\u00a0\u00a0\u00a0<nvram template=”\/usr\/share\/OVMF\/OVMF_VARS_4M.ms.fd” templateFormat=”raw” format=”raw”>\/var\/lib\/libvirt\/qemu\/nvram\/win10.VARS.fd<\/nvram>\u00a0\u00a0\u00a0\u00a0\u00a0<boot dev=”hd”\/>\u00a0<\/os> …and it just boots! At least on Debian 13 … Continue reading Win10: Converting KVM \/ virt-manager from BIOS to UEFI boot w\/TPM<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.sayso.net\/index.php?rest_route=\/wp\/v2\/posts\/12073"}],"collection":[{"href":"https:\/\/www.sayso.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sayso.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sayso.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sayso.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12073"}],"version-history":[{"count":4,"href":"https:\/\/www.sayso.net\/index.php?rest_route=\/wp\/v2\/posts\/12073\/revisions"}],"predecessor-version":[{"id":12077,"href":"https:\/\/www.sayso.net\/index.php?rest_route=\/wp\/v2\/posts\/12073\/revisions\/12077"}],"wp:attachment":[{"href":"https:\/\/www.sayso.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12073"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sayso.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12073"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sayso.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12073"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}