O que get-edid quer dizer com "Não fornecer modo padrão"?

Observando um monitor HP ZR24w, executado parse-edida partir de uma instalação do Ubuntu 24.04.1 LTS, obtivemos 6 relatórios de Not giving standard mode:

$ sudo get-edid -b 1 | parse-edid
1
This is read-edid version 3.0.2. Prepare for some fun.
Attempting to use i2c interface
Only trying 1 as per your request.
128-byte EDID successfully retrieved from i2c bus 1
Looks like i2c was successful. Have a good day.
Checksum Correct

Section "Monitor"
    Identifier "HP ZR24w"
    ModelName "HP ZR24w"
    VendorName "HWP"
    # Monitor Manufactured week 2 of 2011
    # EDID version 1.3
    # Digital Display
    DisplaySize 540 350
    Gamma 2.20
    Option "DPMS" "true"
    Horizsync 24-80
    VertRefresh 59-61
    # Maximum pixel clock is 170MHz
    #Not giving standard mode: 1280x960, 60Hz
    #Not giving standard mode: 1280x1024, 60Hz
    #Not giving standard mode: 1440x900, 60Hz
    #Not giving standard mode: 1600x1200, 60Hz
    #Not giving standard mode: 1680x1050, 60Hz
    #Not giving standard mode: 1920x1080, 60Hz
    Modeline    "Mode 0" +hsync -vsync 
EndSection

Enquanto que se usar, edid-decodeas informações de tempo serão exibidas para os 6 modos padrão:

$ sudo get-edid -b 1 | edid-decode
1
This is read-edid version 3.0.2. Prepare for some fun.
Attempting to use i2c interface
Only trying 1 as per your request.
128-byte EDID successfully retrieved from i2c bus 1
Looks like i2c was successful. Have a good day.
edid-decode (hex):

00 ff ff ff ff ff ff 00 22 f0 6a 28 01 01 01 01
02 15 01 03 80 36 23 78 2e fc 81 a4 55 4d 9d 25
12 50 54 21 08 00 81 40 81 80 95 00 a9 40 b3 00
d1 c0 01 01 01 01 28 3c 80 a0 70 b0 23 40 30 20
36 00 22 60 21 00 00 1a 00 00 00 fd 00 3b 3d 18
50 11 00 0a 20 20 20 20 20 20 00 00 00 fc 00 48
50 20 5a 52 32 34 77 0a 20 20 20 20 00 00 00 ff
00 43 4e 54 31 30 32 31 34 30 36 0a 20 20 00 83

----------------

Block 0, Base EDID:
  EDID Structure Version & Revision: 1.3
  Vendor & Product Identification:
    Manufacturer: HWP
    Model: 10346
    Serial Number: 16843009
    Made in: week 2 of 2011
  Basic Display Parameters & Features:
    Digital display
    Maximum image size: 54 cm x 35 cm
    Gamma: 2.20
    DPMS levels: Off
    RGB color display
    Default (sRGB) color space is primary color space
    First detailed timing is the preferred timing
  Color Characteristics:
    Red  : 0.6435, 0.3349
    Green: 0.3037, 0.6132
    Blue : 0.1464, 0.0703
    White: 0.3125, 0.3291
  Established Timings I & II:
    DMT 0x04:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    DMT 0x09:   800x600    60.316541 Hz   4:3     37.879 kHz     40.000000 MHz
    DMT 0x10:  1024x768    60.003840 Hz   4:3     48.363 kHz     65.000000 MHz
  Standard Timings:
    DMT 0x20:  1280x960    60.000000 Hz   4:3     60.000 kHz    108.000000 MHz
    DMT 0x23:  1280x1024   60.019740 Hz   5:4     63.981 kHz    108.000000 MHz
    DMT 0x2f:  1440x900    59.887445 Hz  16:10    55.935 kHz    106.500000 MHz
    DMT 0x33:  1600x1200   60.000000 Hz   4:3     75.000 kHz    162.000000 MHz
    DMT 0x3a:  1680x1050   59.954250 Hz  16:10    65.290 kHz    146.250000 MHz
    DMT 0x52:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz
  Detailed Timing Descriptors:
    DTD 1:  1920x1200   59.950171 Hz   8:5     74.038 kHz    154.000000 MHz (546 mm x 352 mm)
                 Hfront   48 Hsync  32 Hback   80 Hpol P
                 Vfront    3 Vsync   6 Vback   26 Vpol N
    Display Range Limits:
      Monitor ranges (GTF): 59-61 Hz V, 24-80 kHz H, max dotclock 170 MHz
    Display Product Name: 'HP ZR24w'
    Display Product Serial Number: 'CNT1021406'
Checksum: 0x83

O código-fonte parse-edid.c tem o seguinte bloco para lidar com tempos padrão :

    //Standard Timings - put these after dtd's, because this way preferred is up top.
    /* I started doing this, but I think it's unnecessary. Think not? you do it. I'll comment what you're missing.*/
    int refresh;
    for (i = 0x26; i < 0x36; i += 0x2) { //read through list of resolutions...
        if (!(edid[i] == 1 && edid[i+1] == 1)) { //skip if it's "blank"
            hres = (((int)edid[i]) + 31) * 8;
            switch ((edid[i+1] & 0xC0) >> 6) {
                case 0: vres = (hres * 10) / 16; //16:10 aspect ratio
                break;
                case 1: vres = (hres * 3) / 4; //4:3
                break;
                case 2: vres = (hres * 4) / 5; //5:4
                break;
                case 3: vres = (hres * 9) / 16; //16:9
                break;
                default: diewemail("The impossible has happened.\n");
            }
            refresh = (edid[i+1] & 0x3F) + 60;
            printf("\t#Not giving standard mode: ");
            printf("%ix%i, %iHz\n", hres, vres, refresh);
            /*
            printf("\tMode\t\"%ix%i\"\n", hres, vres);
            printf("\t\tDotClock\t%.6f\n", (float)((hres * vres) * (((edid[i+1] & 0x3f) + 60)) / 1000000)); //(pixels/screen) * (screen/sec) / a million = megapixels/sec, aka dot clock in mHz
            printf("\t\tHTimings\t\n");*/

Observe que as 3 últimas afirmações estão comentadas.

O que Not giving standard modesignifica?

Com base no código-fonte, parse-edidisso significa que o autor do programa decidiu gerar a saída Not giving standard modepara modos de temporização padrão, em vez de relatar as informações de temporização.

Meu monitor está fornecendo alguma informação de modo de vídeo para a fonte do sinal?

Se parse-edidrelatar um modo padrão , significa que o monitor suporta o modo.

Considerando que edid-decoderelata mais informações, sugiro que você use edid-decodeem vez disso.