I believe the BIOS is at the latest rev, namely A16. No discernible advantage to any one over the others. I've swapped out display, keyboard and mouse, using all of the VGA/DisplayPort and USB/PS2 combinations and permutations available. Ctrl-Alt-F1 also works (if I'm fast) so I can do things at the console. I've installed ssh, and Ethernet and the TCP/IP protocol stack are working, so I can do things at the command line remotely. Lots of scroll-blinding stack traces etc. Clicking the button that loads the error detail into a pane is completely uninformative to me at my skill level. I say "fairly" because twice I have managed to get a GUI desktop up and kind-of working, with a spattering of GUI alert boxes saying the system has encountered an error. The system fairly reliably hangs when X (or Unity, I guess) starts. I eventually got Ubuntu installed by disabling lots of things in a scattershot style on the GRUB boot line: nomodeset, acpi=off, nolocalapic. I can't get the LMDE live DVD as far as running the installer, even tinkering with the GRUB boot line. The problem seems to be with the onboard Intel graphics.
#Optiplex 790 display driver not working Pc#
Being as old as it is though, I'd imagine OP has moved on from that system by now anyway.Long time since I had trouble getting a major distro (tried both Ubuntu 15.10 and Linux Mint Debian Edition 2) installed and running clean and simple on a brand-name PC (refurb from a leading UK refurb specialist). It's more than likely there isn't any audio connection at all for the DP on this machine.
This is much the same way that earlier Nvidia cards supported audio through HDMI, by merely connecting to the S/PDIF source elsewhere and amalgamating it with the TMDS stream.Įven if you could get audio, it'd be limited to 2ch PCM (and you could not get even compressed DD/DTS as DP doesn't support any Dolby or DTS formats at all).
#Optiplex 790 display driver not working series#
I believe that even using HDMI on the old 3 and 4 series chipsets (on the few boards that had it) would result in no audio unless it was internally connected to S/DIF output of a soundcard (either an actual soundcard or an on-board chip). You'd need something Core iX (even first gen) to have any audio out of the video outputs. Pretty sure none of those older chipset-based video outputs supported audio at all. This would be getting output for the on-board video connections from Intel GMA Graphics-likely something like GMA X4500. I wasn't aware of this previously and assumed it was newer. This is an old thread, bumped, but I just noticed the Optiplex 780 is a C2D machine, likely with a 4-series chipset. I will try an active adapter, but as you've mentioned, that will not guarantee the audio will work.Īnybody with the same computer encounter these issues and find a solution or adapter that works? I'm assuming what I have is a passive adapter. So here you will get an image and you may think it's HDMI but it's really just a single-link DVI signal, compatible with HDMI but does not support audio.ĮS_Revenge wrote: ↑DP does support audio actually but only multi-PCM (bitstreaming not supported). Note also that in the case that the machine doesn't actually support HDMI-proper, using a passive adapter may just be getting you DVI and not HDMI. You're interested only in the audio capabilities of the HDMI functionality of the board (in the case of a passive adapter) or the audio capabilities of both the DP and the adapter (in the case of an active adapter). Note as well that some (particularly older) DP implementations never had audio at all-in that case you won't get audio with an active adapter either. Again you will only get PCM audio this way and many active adapters are 2.0 only (I have one that's supposed to do up to 7.1 but in reality it doesn't). In this case you have to make sure the adapter supports audio and supports how many channels you need. If you're using an active adapter though, you are converting a DP signal to HDMI.
In this case you are using the D++ functionality (as I like to call it and is indicated by the icon) meaning you should be getting an actual HDMI signal from the card/board, just as if you had plugged into an HDMI port. When you connect an adapter to a computer's DP you're not really connecting DP at all, if you're using a passive adaper. DP does support audio actually but only multi-PCM (bitstreaming not supported).
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