{"id":594,"date":"2013-12-10T10:52:34","date_gmt":"2013-12-10T09:52:34","guid":{"rendered":""},"modified":"2018-11-01T00:05:53","modified_gmt":"2018-10-31T23:05:53","slug":"upgrade-virtualbox-434-fail-start-virtual-machines-vt-x-error","status":"publish","type":"post","link":"https:\/\/nil.uniza.sk\/en\/upgrade-virtualbox-434-fail-start-virtual-machines-vt-x-error\/","title":{"rendered":"Upgrade on Virtualbox 4.3.4 – fail to start virtual machines – VT-x error"},"content":{"rendered":"
\n\tI'm using virtualbox to run couple of my virtual machines inside of the Windows 7 64bit. Two days ago I have upgraded my running Virtualbox software to new version 4.3.4. After upgrade I was not able to start and run any of my virtual machines (Win7 32it, Xubuntu, KaliLinux, Mint) which works fine inside of previous virtualbox version.<\/div>\n
\n\t <\/div>\n
\n\tAfter start I have received window with message telling that VT-x is disabled inside of the BIOS. The log file I have found inside one of the machines telling the same:<\/div>\n
\r\n00:00:01.008134 VMSetError: D:\\tinderbox\\win-4.3\\src\\VBox\\VMM\\VMMR3\\HM.cpp(531) int __cdecl HMR3Init(struct VM *); rc=VERR_VMX_MSR_SMX_VMXON_DISABLED\r\n00:00:01.008163 VMSetError: VT-x is disabled in the BIOS for Safer-Mode\/Trusted Extensions.\r\n00:00:01.010176 ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={8ab7c520-2442-4b66-8d74-4ff1e195d2b6} aComponent={Console} aText={VT-x is disabled in the BIOS for Safer-Mode\/Trusted Extensions. (VERR_VMX_MSR_SMX_VMXON_DISABLED)}<\/span>, preserve=false\r\n00:00:01.065228 Power up failed (vrc=VERR_VMX_MSR_SMX_VMXON_DISABLED, rc=E_FAIL (0X80004005))<\/pre>\n
\n\tSome guides recommends to enable virtualization support inside of PC BIOS, but as I mentioned, before upgrade everything work fine. Anyway I've tried it, hovever I have not found required option (older BioS, Q8550 Intel CPU). <\/div>\n
\n\t <\/div>\n
\n\tInside of Virtualbox the acceleration settings which is available through virtual machine Settings -> System -> Acceleration tab is grayed out and unaccessible.<\/div>\n
\n\t <\/div>\n
\n\tThen I found the solution<\/a>, which recommends disable VT-x, so run <\/div>\n
\n
\r\nvboxmanage list vms<\/code><\/pre>\n<\/div>\n
\n\t <\/div>\n
\n\twhere in my case shows my VMs<\/div>\n
\n\t\"\"<\/div>\n
\n\t <\/div>\n
\n\t <\/div>\n
\n\tand then <\/div>\n
\n
\r\nvboxmanage modifyvm <name or uuid of vm> --longmode off<\/code><\/pre>\n<\/div>\n
\n\t <\/div>\n
\n\tin my case for example<\/div>\n
\n
\r\nvboxmanage modifyvm Win7-32 --longmode off<\/code><\/pre>\n<\/div>\n
\n\t <\/div>\n
\n\tNow I'm able at least start and run Win 7 – 32bit, KaliLinux (32bit debian) VB machines. Other machine does not run (MInt, Xubuntu) with critical error.<\/div>\n
\n\t <\/div>\n
\n\tNotes:<\/strong><\/div>\n
    \n
  1. \n\t\tNote1: Downgrade to VBox 4.3.2 does not help.<\/li>\n
  2. \n\t\tNote2: Try edit VM_NAME.vbox file where replace <HardwareVirtEx enabled="true"\/> for <HardwareVirtEx enabled="false"\/><\/li>\n
  3. \n\t\tNote3: After a while after writing this post I have found an easy way and I did upgrade of my MotherBoard BIOS (5year old) to the latest one. This solve my issue and i'm able finally use and setup VT-x (Settings -> System -> Acceleration tab is accessible now). This allows me to run again 64bit guest OSs inside of my VirtualBox.<\/li>\n<\/ol>\n
    \n\t <\/div>","protected":false},"excerpt":{"rendered":"
    \n\tI'm using virtualbox to run couple of my virtual machines inside of the Windows 7 64bit. Two days ago I have upgraded my running Virtualbox software to new version 4.3.4. After upgrade I was not able to start and run any of my virtual machines (Win7 32it, Xubuntu, KaliLinux, Mint) which works fine inside of previous virtualbox version.<\/div>\n
    \n\t <\/div>\n
    \n\tAfter start I have received window with message telling that VT-x is disabled inside of the BIOS. The log file I have found inside one of the machines telling the same:<\/div>\n
    ","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[825],"tags":[],"class_list":["post-594","post","type-post","status-publish","format-standard","hentry","category-virtualization-virtualbox-en"],"taxonomy_info":{"category":[{"value":825,"label":"VirtualBox"}]},"featured_image_src_large":false,"author_info":{"display_name":"admin","author_link":"https:\/\/nil.uniza.sk\/en\/author\/admin\/"},"comment_info":1,"category_info":[{"term_id":825,"name":"VirtualBox","slug":"virtualization-virtualbox-en","term_group":0,"term_taxonomy_id":823,"taxonomy":"category","description":"","parent":819,"count":12,"filter":"raw","cat_ID":825,"category_count":12,"category_description":"","cat_name":"VirtualBox","category_nicename":"virtualization-virtualbox-en","category_parent":819}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/nil.uniza.sk\/en\/wp-json\/wp\/v2\/posts\/594","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nil.uniza.sk\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nil.uniza.sk\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nil.uniza.sk\/en\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/nil.uniza.sk\/en\/wp-json\/wp\/v2\/comments?post=594"}],"version-history":[{"count":0,"href":"https:\/\/nil.uniza.sk\/en\/wp-json\/wp\/v2\/posts\/594\/revisions"}],"wp:attachment":[{"href":"https:\/\/nil.uniza.sk\/en\/wp-json\/wp\/v2\/media?parent=594"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nil.uniza.sk\/en\/wp-json\/wp\/v2\/categories?post=594"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nil.uniza.sk\/en\/wp-json\/wp\/v2\/tags?post=594"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}