[00:01] yes, i also noticed lspci doesn't need it just now. it's just that the module documentation lists two 'x', not just one, and i don't know how it would treat it. so worth a try. [00:01] the goal with the vritual screen is to use it to try the solution to my problem discussed in this https://bbs.archlinux.org/viewtopic.php?id=214841 [00:02] run update-pciids to maybe have lspci output something better than "[AMD/ATI] Device 1478 (rev c1)" [00:03] that's a clever approach with this arch forum post :) [00:05] tomreyn: that command without root prints a read-only message, with permissions yields "Downloaded daily snapshot dated 2019-09-18 03:15:02". using the same lspci command again gives the same output no change. my graphics card is AMD Radeon RX 5700 XT [00:07] tomreyn: unfortunately my computer does not have a USB-C port which seems to be required for that product [00:07] i guess you need to register to https://pci-ids.ucw.cz/read/PC/1002/ and submit it then ;) [00:09] about the displaylink adapters, they do not actually support linux on those two (yet?), sorry. [00:10] misternumberone: Have not followed this conversation - user here: https://ubuntuforums.org/showthread.php?t=2425799 details a how to that works for his AMD RX 5700. [00:11] Bashing-om: it's running, the goal is to join two monitors and present them to applications as one. [00:12] how about the wayland session ? [00:12] tomreyn: Ouch .. thanks, However now "I know nothing" . [00:14] Bashing-om: I have full accelerated 3d opengl performance comparable to other operating systems using the mesa/amdgpu/RadeonSI open source driver - for windowed applications. fullscreen applications are glitching out in a way they didn't on the same display setup when i was using NVIDIA GPU because the X server is exposing the physical monitors' resolution to them, when I need the entire screen to be extended across all dis [00:14] plays [00:15] it's three identical-model 1920x1080 panels rotated left and used adjacent [00:17] i need to use fullscreen across the full 3240x1920 space, which I achieved on nvidia by creating a single X screen, but I have as yet not found a way to achieve the same functionality on AMD [00:18] i am going to update grub and reboot to see if adding that 0 helped activate a virtual display at all [00:23] xrandr --properties still only lists 4 outputs corresponding to the physical outputs of my card (3 displayport 1 hdmi) [00:23] and --listproviders is the same, too, i assume? [00:25] hmm I noticed something wrong, i'll adjust it and see if there's a change [00:25] and yeah xrandr --listproviders shows only the GPU itself [00:25] with "outputs: 4" [00:43] i'm out of ideas, suggest you ask in #amdgpu and / or the relevant AMD support forum. [00:44] well i noticed that lspci | grep VGA reports that the pci address of my graphics card is actually 0000:03:00.0 [00:44] whoops [00:45] i guess this explains why i had no hits when searching for "[AMD/ATI] Device 1478" [00:48] so I used that in the kernel parameter. when I boot ubuntu normally, there is a moment where the screen is all gray, after POST but before the ubuntu logo. this may be GRUB2 because my boot menu is currently disabled, I can check this. however when I booted with the new parameters my screen turned gray and stayed that way. CPU was still active though. so i had to chroot and revert the parameter to come back [00:49] it may be easier to edit those parameters from the grub menu then instead of making them permanent right away [00:52] ok