Changeset 95214 in vbox for trunk/doc/manual/en_US
- Timestamp:
- Jun 7, 2022 6:09:45 PM (3 years ago)
- svn:sync-xref-src-repo-rev:
- 151724
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
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trunk/doc/manual/en_US/user_GuestAdditions.xml
r92540 r95214 796 796 them in a setting which our installer does not handle 797 797 correctly, see <xref linkend="guestxorgsetup" />. 798 </para> 799 800 <para> 801 Starting from &product-name; 7, Linux guest screen resize 802 functionality for guests running VMSVGA graphics configuration 803 has been changed. Since then, this functionality consists 804 of a standalone daemon called VBoxDRMClient and its Desktop 805 Environment helper counterpart. 806 </para> 807 808 <para> 809 VBoxDRMClient is running as a root process and, in fact, is 810 a bridge between host and guest's vmwgfx driver. This means that 811 VBoxDRMClient listens to screen resize hints from host and 812 forwards them to vmwgfx driver. This allows to make guest screen resize 813 functionality available before user performed graphical log-in. 814 </para> 815 816 <para> 817 In order to perform Desktop Environment specific actions, such 818 as setting primary screen in multi monitor setup, a Desktop Environment 819 helper is used. Once user performed graphical log-in operation, 820 helper daemon starts in scope of user session and attempts to 821 connect to VBoxDRMClient using IPC connection. Once VBoxDRMClient received 822 corresponding command from host, it is forwarded to helper daemon 823 over IPC and action then performed. 824 </para> 825 826 <para> 827 By default, VBoxDRMClient allows any process to connect to its IPC 828 socket. This can be restricted once two actions are taken. Starting 829 from &product-name; 7, Guest Additions Linux installer will also 830 create 'vboxdrmipc' user group. Corresponding user needs to be added 831 into this group. The last action is to set the following guest property: 832 833 <screen>VBoxManage guestproperty set "VM name" /VirtualBox/GuestAdd/DRMIpcRestricted 1 \ 834 --flags RDONLYGUEST</screen> 835 </para> 836 837 <para> 838 Note, it is important to set RDONLYGUEST flag to the property, so 839 it cannot be changed from inside guest. All actions are required. If one of 840 them is missing, all processes will have access to IPC socket. Restricted 841 mode can be disabled by deleting guest property: 842 843 <screen>VBoxManage guestproperty unset "VM name" /VirtualBox/GuestAdd/DRMIpcRestricted</screen> 798 844 </para> 799 845
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