Package: displaylink-driver
Version: 6.1-2
Severity: important
X-Debbugs-Cc: [email protected]
Dear Maintainer,
On Debian 13 Trixie, displaylink-driver 6.1-2 fails to provide video output on
my Lenovo ThinkPad Hybrid USB-C with USB-A Dock (40AF).
The dock itself is detected correctly, power, Ethernet and USB works, the evdi
kernel module loads successfully, and displaylink-driver.service is active.
However, DisplayLinkManager doesn't attach to the EVDI DRM devices and
DisplayPort & HDMI don't output anything.
Running DisplayLinkManager under strace showed that version 6.1-2 attempts to
load the unversioned library "libevdi.so":
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libevdi.so", O_RDONLY|O_CLOEXEC) =
-1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libevdi.so",
O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/libevdi.so", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No
such file or directory)
Installing libevdi-dev provides the missing symlink:
$ dpkg -S /usr/lib/libevdi.so
libevdi-dev: /usr/lib/libevdi.so
$ ls -l /usr/lib/libevdi.so*
/usr/lib/libevdi.so -> libevdi.so.1
/usr/lib/libevdi.so.1 -> libevdi.so.1.14.8
/usr/lib/libevdi.so.1.14.8
After installing libevdi-dev and restarting, DisplayLink video output works
correctly.
I also tested Debian's displaylink-driver 6.3-1. The issue is fixed (i think)
there: strace shows DisplayLinkManager loading libevdi.so.1 successfully
instead of attempting to load libevdi.so:
openat(AT_FDCWD, "/lib/libevdi.so.1", O_RDONLY|O_CLOEXEC) = 10
Regards,
Nedyalko Tenev
-- System Information:
Debian Release: 13.6
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 6.12.101+deb13-amd64 (SMP w/16 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages displaylink-driver depends on:
ii evdi-dkms 1.14.8+dfsg-1
ii libc6 2.41-12+deb13u3
ii libgcc-s1 14.2.0-19
ii libstdc++6 14.2.0-19
ii libusb-1.0-0 2:1.0.28-1
ii libuuid1 2.41.5-0+deb13u1
displaylink-driver recommends no packages.
displaylink-driver suggests no packages.
-- no debconf information
