On Fri, 14 Aug 2020 10:07:48 +0100 Sam Morris <[email protected]> wrote: > Package: virtualbox-guest-x11 > Version: 6.1.12-dfsg-9 > Severity: important > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > VirtualBox guest additions now includes a VBoxDRMClient program that > is missing from the Debian package. > > I believe this is used for 3d acceleration under Wayland. I've not > had a change to switch over to Wayland to confirm yet.
In at least VirtualBox 7 and higher, this executable is used to notify the VMSVGA driver that the virtual display's size has changed. This data then propagates down to userspace via udev events, which presumably can then use that information to dynamically resize the display. Under X11, VirtualBox's guest additions appear to fall back to some other way of sending these notifications, but in CLI-only sessions and some Wayland compositors, this isn't possible and thus userspace simply doesn't know the display changed size as a result of the missing executable. This issue affects Debian Trixie, and is making it difficult for me to set up labwc to dynamically change its resolution under VirtualBox using Debian's version of the VirtualBox guest additions. -- Aaron > Note that upstream installs VBoxDRMClient setuid root and activates it > from VBoxClient --vmsvga; Fedora patch their package to drop the > setuid bit, launch VBoxDRMClient as a systemd service, and activate > the service by udev rules. These changes can be found at > <https://www.virtualbox.org/ticket/19647>. > > - -- System Information: > Debian Release: bullseye/sid > APT prefers testing > APT policy: (530, 'testing'), (520, 'unstable'), (1, 'experimental') > Architecture: amd64 (x86_64) > Foreign Architectures: arm64 > > Kernel: Linux 5.7.0-2-amd64 (SMP w/2 CPU threads) > Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE > Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), > LANGUAGE not set Shell: /bin/sh linked to /bin/dash > Init: systemd (via /run/systemd/system) > > Versions of packages virtualbox-guest-x11 depends on: > ii libc6 2.31-3 > ii libnotify-bin 0.7.9-1 > ii libx11-6 2:1.6.10-3 > ii libxext6 2:1.3.3-1+b2 > ii libxmu6 2:1.1.2-2+b3 > ii libxt6 1:1.1.5-1+b3 > ii virtualbox-guest-utils 6.1.12-dfsg-9 > ii x11-xserver-utils 7.7+8 > ii xserver-xorg-core [xorg-video-abi-24] 2:1.20.8-2 > > virtualbox-guest-x11 recommends no packages. > > virtualbox-guest-x11 suggests no packages. > > - -- Configuration Files: > /etc/X11/Xsession.d/98vboxadd-xclient changed [not included] > > - -- no debconf information > > -----BEGIN PGP SIGNATURE----- > > iQJGBAEBCAAwFiEEyqqqGsppqDqJKxhV0gtCAlzaJ7kFAl82VF8SHHNhbUByb2Jv > dHMub3JnLnVrAAoJENILQgJc2ie5KBkP/RCmH8TOFHyNCqJtYSM3rf5iy6fHF/Bu > i8BVWf0RmHxI5TmYH48vXKz7WWkUnumMbP1BKehPCAmDVFiZ9cZt1adpkK9OCcrw > /cSFhvvikcFYWi0ywYCPQ9Dnzt+XwqBIk/q2gxkylorL2QxOYD5lyJ4I7W8aLkXh > m23APTwOkHXIdt81od5jS8E2RrbYRwrDmJSVrihuhJzMPuNp7pZ5REkSbcjwPhF6 > l0V9YWmoy4mZjuccW4u0Ajh2e5OO8fj4mtVwCelP85wstuKVN4dE0je4RtuOHCTD
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