Re: Debian 13: Mini Display Port not accessible any more (worked flawlessly with Debian 12)
Johannes Heilmann composed on 2025-08-28 21:34 (UTC+0200):
> $inxi -GSaz
> System:
> Kernel: 6.12.41+deb13-amd64 arch: x86_64 bits: 64 compiler: gcc v: 14.2.0
> clocksource: hpet avail: acpi_pm
> parameters: BOOT_IMAGE=/vmlinuz-6.12.41+deb13-amd64
> root=/dev/mapper/patrona--vg-root ro quiet
...
> Graphics:
> Device-1: NVIDIA C79 [GeForce 9400M] vendor: Apple MacBook5 1
> driver: nouveau v: kernel non-free: series: 340.xx
> status: legacy (EOL~2019-12-xx) last: release: 340.108 kernel: 5.4
> xorg: 1.20 arch: Tesla process: 40-80nm built: 2006-2013 ports:
> active: LVDS-1 empty: none bus-ID: 02:00.0 chip-ID: 10de:0863
> class-ID: 0300 temp: 73.0 C
...
> Monitor-1: LVDS-1 model: Apple 0x9c8c serial: <filter> built: 2008 res:
> mode: 1280x800 hz: 60 scale: 100% (1) dpi: 114 gamma: 1.2
> size: 286x179mm (11.26x7.05") diag: 337mm (13.3") ratio: 16:10 modes:
> max: 1280x800 min: 640x350
2008, 17 years old. Most looks fine: exceptions for the absence of any DP
connections, and the claim ports other than LVDS-1 are empty. I don't have
anything that age with any DP ports to test with.
Does xrandr show any other connectors besides LVDS? Is DisplayPort
or DP listed as any part in 'ls -gGh /sys/class/drm/card*' output?
# inxi -SMz
System:
Kernel: 6.12.41+deb13-amd64 arch: x86_64 bits: 64
Desktop: TDE (Trinity) v: R14.1.4 Distro: Debian GNU/Linux 13 (trixie)
Machine:
Type: Desktop Mobo: BIOSTAR model: T41 HD serial: N/A
BIOS: American Megatrends v: 080015 date: 09/22/2009
# inxi -Gxxz
Graphics:
Device-1: NVIDIA GF119 [NVS 310] vendor: Hewlett-Packard driver: nouveau
v: kernel arch: Fermi pcie: speed: 2.5 GT/s lanes: 16 ports:
active: DP-1,DP-2 empty: none bus-ID: 01:00.0 chip-ID: 10de:107d
temp: 47.0 C
Display: x11 server: X.Org v: 21.1.16 compositor: Twin v: 3.0 driver: X:
loaded: modesetting unloaded: fbdev,vesa dri: nouveau gpu: nouveau
display-ID: :0 screens: 1
Screen-1: 0 s-res: 3600x1200 s-dpi: 120
Monitor-1: DP-1 pos: primary,left model: NEC EA243WM res: 1920x1200 hz: 60
dpi: 94 diag: 612mm (24.1")
Monitor-2: DP-2 pos: right model: Dell P2213 res: 1680x1050 hz: 60 dpi: 90
diag: 558mm (22")
API: EGL v: 1.5 platforms: device: 0 drv: nouveau device: 1 drv: swrast
gbm: drv: nouveau surfaceless: drv: nouveau x11: drv: nouveau
inactive: wayland
API: OpenGL v: 4.5 compat-v: 4.3 vendor: mesa v: 25.0.7-2 glx-v: 1.4
direct-render: yes renderer: NVD9 device-ID: 10de:107d
API: Vulkan v: 1.4.309 surfaces: xcb,xlib device: 0 type: cpu
driver: mesa llvmpipe device-ID: 10005:0000
Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo gpu: gputop,
intel_gpu_top, lsgpu x11: xdriinfo, xdpyinfo, xprop, xrandr
# ls -gGh /sys/class/drm/card*
lrwxrwxrwx 1 0 Aug 28 20:07 /sys/class/drm/card0 -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0
lrwxrwxrwx 1 0 Aug 28 20:07 /sys/class/drm/card0-DP-1 -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0/card0-DP-1
lrwxrwxrwx 1 0 Aug 28 20:07 /sys/class/drm/card0-DP-2 -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0/card0-DP-2
#
Above FTR is from my oldest NVidia card with DisplayPorts, 2 generations
newer than yours, and only outputs are those two DPs.
Are there any disturbing graphics messages in dmesg or
'sudo journalctl -b -p3 --no-hostname'?
If you have Xorg.0.log[.old] containing more than two (EE) lines in /var/log/ or ~/.local/share/xorg/ please use pastebinit to share.
You could try to force enabling a DP-1 to show up by adding to your
bootloader's linu line thus:
video=DP-1:e
See: https://www.kernel.org/doc/Documentation/fb/modedb.txt for video= details.
Based upon what follows below, I suspect because it's a Mac this won't work.
I just gave some outside the box thought to this. I may have a related problem
with a 27" 2560x1440 2012 iMac bought this past spring that I've hardly used. It
has a Kepler, same age as the NVidia above, with two outputs labeled thunderbolt.
Trying to use it with the mini-DP/TB port connected to a 1680x1050 Dell's DP
input is turning off the 27" screen if I switch to any of the vtty's not using
X — /if/ I have included an otherwise valid video= parameter on the bootloader
linu line like works on all PCs I've ever used. Anyway FTR comparison:
# inxi -MSz
System:
Kernel: 6.15.8-1-default arch: x86_64 bits: 64
Desktop: TDE (Trinity) v: R14.1.4 Distro: openSUSE Tumbleweed 20250827
Machine:
Type: Desktop System: Apple product: iMac13,2 v: 1.0 serial: <filter>
Mobo: Apple model: Mac-FC02E91DDD3FA6A4 v: iMac13,2 serial: <filter>
UEFI: Apple v: 429.0.0.0.0 date: 03/18/2022
# inxi -Gxxz
Graphics:
Device-1: NVIDIA GK104M [GeForce GTX 680MX] vendor: Apple iMac 13 2
driver: nouveau v: kernel arch: Kepler-2 pcie: speed: 2.5 GT/s lanes: 16
ports: active: DP-1,DP-2 empty: DP-3 bus-ID: 01:00.0 chip-ID: 10de:11a3
temp: 44.0 C
Device-2: Apple FaceTime HD Camera (Built-in) driver: uvcvideo type: USB
rev: 2.0 speed: 480 Mb/s lanes: 1 bus-ID: 1-1.1:3 chip-ID: 05ac:8511
Display: x11 server: X.Org v: 21.1.15 compositor: Twin v: 3.0 driver: X:
loaded: modesetting dri: nouveau gpu: nouveau display-ID: :0 screens: 1
Screen-1: 0 s-res: 4240x1440 s-dpi: 120
Monitor-1: DP-1 pos: primary,left model: Apple iMac res: 2560x1440 hz: 60
dpi: 109 diag: 685mm (27")
Monitor-2: DP-2 pos: right model: Dell P2213 res: 1680x1050 hz: 60 dpi: 90
diag: 558mm (22")
API: EGL v: 1.5 platforms: device: 0 drv: nouveau device: 1 drv: swrast
gbm: drv: nouveau surfaceless: drv: nouveau x11: drv: nouveau
inactive: wayland
API: OpenGL v: 4.5 compat-v: 4.3 vendor: mesa v: 25.1.7 glx-v: 1.4
direct-render: yes renderer: NVE4 device-ID: 10de:11a3
API: Vulkan v: 1.4.321 surfaces: N/A device: 0 type: cpu
driver: mesa llvmpipe device-ID: 10005:0000
Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo x11: xdriinfo,
xdpyinfo, xprop, xrandr
# ls -gGh /sys/class/drm/card*
lrwxrwxrwx 1 0 Aug 28 20:52 /sys/class/drm/card0 -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0
lrwxrwxrwx 1 0 Aug 28 20:52 /sys/class/drm/card0-DP-1 -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0/card0-DP-1
lrwxrwxrwx 1 0 Aug 28 20:52 /sys/class/drm/card0-DP-2 -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0/card0-DP-2
lrwxrwxrwx 1 0 Aug 28 20:52 /sys/class/drm/card0-DP-3 -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0/card0-DP-3
#
This may be something that will need a bug report filed to fix. If it
worked with pure Debian FOSS before the "upgrade", it should still work. :P
--
Evolution as taught in public schools is, like religion,
based on faith, not based on science.
Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!
Felix Miata
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