Raleigh Henshaw's questions

I have 12GB of ram installed and is recognized by bios. Ubuntu says I only have 9.7GB.

I am running 2 x 4GB and 2 X 2GB. All are DDR3 and I have the larger pair installed in the blue slots (primary) and the smaller sticks in the black slots. The motherboard is a MSI 970A-G43 that can take up to 32GB. I have a 256MB gpu card installed and the motherboard does not have on board video.

I have installed each pair of memory (in the blue slots) without the other and they all are good.

I know it is ill-advised to install ram of different sizes/type, but I feel like if BIOS sees it, Ubuntu should too. How can I correct this?

I'm using audio output over HDMI from my video card (Radeon HD-4650 RV730) to an AVR.

When there is no audio output it seems that the system turns off the audio and my receiver shows no audio input. Then, when audio starts, it takes a second or two for the signal to be recognized by my receiver, so I loose the start of the audio, or don't hear short sounds at all. I'd like to keep this connection "on" or "alive" even when no audio is playing so I don't have to wait for my receiver to switch over.

I believe this is an "idle" setting somewhere, but I'm not sure at what level it is happening. I'm a little fuzzy on how driver/pulseaudio/alsamixer all work together and at what level this can be solved. Rather than poking around and messing something up, I'd appreciate some guidance. Any explanations of commands would be greatly appreciated as I am new to Linux and trying to learn as much as I can.

I'm pretty new to Linux but have some terminal experience from networking/IT classes. I've tried searching (a lot) but can't figure out what I need to do .

I'm on Ubuntu 17.10 and using the system as a HTPC. My video card is an older ATI Radeon HD4650(RV730). I'm using the open-source "RadeonDrvier". The HDMI output of the card is connected to a 7.1 AVR and then a 4K HDTV.

My problem is that I can't get anything other than stereo to be output. When I go into setting>sound I see the card, but the only profile listed in "Digital Stereo (HDMI) Output).

I think that the problem is that my EDL (from /proc/asound/card0/eld#0.0) shows sad0_channels and sad1_channels shows "2".

Also, alsamixer only shows S/Pdif.

I know a the common response will be "buy a new card" but I am disabled and beyond broke. I have two of these cards and they work fine on Windows, I'm just hoping I can find a fix until I can afford a new 4K GPU.

Thanks in advance!

PS - get-edid produced the following output.

Section "Monitor"
    Identifier "SONY AVAMP"
    ModelName "SONY AVAMP"
    VendorName "SNY"
    # Monitor Manufactured week 10 of 2009
    # EDID version 1.3
    # Digital Display
    DisplaySize 1110 620
    Gamma 2.20
    Option "DPMS" "false"
    Horizsync 15-135
    VertRefresh 24-75
    # Maximum pixel clock is 600MHz



#Extension block found. Parsing...
    Modeline    "Mode 10" 74.25 1920 2448 2492 2640 540 542 547 562 +hsync +vsync interlace
    Modeline    "Mode 0" 148.50 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync 
    Modeline    "Mode 1" 148.500 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync
    Modeline    "Mode 2" 148.500 1920 2448 2492 2640 1080 1084 1089 1125 +hsync +vsync
    Modeline    "Mode 3" 74.250 1280 1390 1420 1650 720 725 730 750 +hsync +vsync
    Modeline    "Mode 4" 74.250 1280 1720 1760 1980 720 725 730 750 +hsync +vsync
    Modeline    "Mode 5" 74.250 1920 2008 2052 2200 1080 1082 1087 1125 +hsync +vsync interlace
    Modeline    "Mode 6" 74.250 1920 2448 2492 2640 1080 1082 1089 1125 +hsync +vsync interlace
    Modeline    "Mode 7" 74.250 1920 2558 2602 2750 1080 1084 1089 1125 +hsync +vsync
    Modeline    "Mode 8" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync
    Modeline    "Mode 9" 27.000 720 732 796 864 576 581 586 625 -hsync -vsync
    Option "PreferredMode" "Mode 10"
EndSection