Someone has asked me to help with a stage presentation. The venue uses an Epson EB-2247U projector mounted on the ceiling, with HDMI cabling running through the ceiling and wall to an HDMI port in a wall plate at the side of the stage. I can't get direct access to the projector or access its configuration in any way. When I connect my laptop's HDMI port to the projector wall plate (using the same HDMI cable) no HDMI device is detected, and the projector display shows 'No signal'. There are no dmesg events relating to HDMI, nor any other events when the HDMI cable is attached or removed. I have tried rebooting with the HDMI connection already in place, but it makes no difference.
I have been told that the projector works automatically with Windows. I have downloaded the manual for the projector and it seems to indicate that detection should occur without further intervention, although the manual does only make reference to Windows and MacOS.
Do HDMI devices such as the projector require the OS to have a driver for it, or is it simply a matter of complying with the relevant HDMI standard with no driver required?
Any other ideas? The laptop is one of the forever-accursed Nvidia Optimus variants that use Nvidia Prime. Could that be significant?
I've searched on this forum and generally, but I haven't been able to find anything relevant.
Output of inxi -Fxxxrz:
Code: Select all
System: Kernel: 5.4.0-65-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 Console: N/A dm: LightDM 1.30.0
Distro: Linux Mint 20.1 Ulyssa base: Ubuntu 20.04 focal
Machine: Type: Laptop System: TOSHIBA product: Satellite P750 v: PSAY3A-05Q001 serial: <filter> Chassis: type: 10
serial: <filter>
Mobo: TOSHIBA model: PEQAA v: 1.00 serial: <filter> BIOS: TOSHIBA v: 2.40 date: 12/15/2011
Battery: ID-1: BAT1 charge: 3.4 Wh condition: 3.4/4.4 Wh (78%) volts: 12.4/10.8 model: COMPAL PABAS0241231 type: Li-ion
serial: <filter> status: Unknown
CPU: Topology: Single Core model: Intel Core i7-2630QM bits: 64 type: MCP arch: Sandy Bridge rev: 7
L2 cache: 6144 KiB
flags: avx lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 3991
Speed: 798 MHz min/max: 800/2000 MHz Core speed (MHz): 1: 798
Graphics: Device-1: Intel 2nd Generation Core Processor Family Integrated Graphics vendor: Toshiba driver: i915
v: kernel bus ID: 00:02.0 chip ID: 8086:0116
Device-2: NVIDIA GF108M [GeForce GT 540M] vendor: Toshiba driver: nvidia v: 390.141 bus ID: 01:00.0
chip ID: 10de:0df4
Display: server: X.org 1.20.9 driver: modesetting,nvidia unloaded: fbdev,nouveau,vesa tty: 125x72
Message: Advanced graphics data unavailable in console. Try -G --display
Audio: Device-1: Intel 6 Series/C200 Series Family High Definition Audio vendor: Toshiba driver: snd_hda_intel
v: kernel bus ID: 00:1b.0 chip ID: 8086:1c20
Device-2: NVIDIA GF108 High Definition Audio driver: snd_hda_intel v: kernel bus ID: 01:00.1
chip ID: 10de:0bea
Sound Server: ALSA v: k5.4.0-65-generic
Network: Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Toshiba driver: r8169 v: kernel
port: d000 bus ID: 02:00.0 chip ID: 10ec:8168
IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Device-2: Qualcomm Atheros AR9285 Wireless Network Adapter vendor: Askey driver: ath9k v: kernel port: d000
bus ID: 03:00.0 chip ID: 168c:002b
IF: wlp3s0 state: down mac: <filter>
Device-3: Qualcomm Atheros AR3011 Bluetooth type: USB driver: btusb bus ID: 1-1.2:3 chip ID: 0cf3:3005
Drives: Local Storage: total: 465.76 GiB used: 5.80 GiB (1.2%)
ID-1: /dev/sda vendor: Seagate model: ST9500320AS size: 465.76 GiB speed: 1.5 Gb/s rotation: 5799 rpm
serial: <filter> rev: BSM2 scheme: MBR
Partition: ID-1: / size: 449.58 GiB used: 5.80 GiB (1.3%) fs: ext4 dev: /dev/sda2
ID-2: swap-1 size: 8.00 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda1
Sensors: System Temperatures: cpu: 57.0 C mobo: N/A gpu: nvidia temp: 45 C
Fan Speeds (RPM): N/A
Repos: No active apt repos in: /etc/apt/sources.list
Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list
1: deb http://mirror.internode.on.net/pub/linuxmint-packages ulyssa main upstream import backport
2: deb http://mirror.internode.on.net/pub/ubuntu/ubuntu focal main restricted universe multiverse
3: deb http://mirror.internode.on.net/pub/ubuntu/ubuntu focal-updates main restricted universe multiverse
4: deb http://mirror.internode.on.net/pub/ubuntu/ubuntu focal-backports main restricted universe multiverse
5: deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
6: deb http://archive.canonical.com/ubuntu/ focal partner
Info: Processes: 148 Uptime: 10m Memory: 7.68 GiB used: 589.9 MiB (7.5%) Init: systemd v: 245 runlevel: 5 Compilers:
gcc: 9.3.0 alt: 9 Shell: bash v: 5.0.17 inxi: 3.0.38
