Hi all,
I have Fedora 32 installed on my Dell 7779 laptop, which has an Intel HD Graphics 620 card and an NVIDIA GeForce 940MX card. I recently bought a Dell P2720D monitor, which has a resolution of 2560x1440 @ 60Hz. This resolution works fine on my Windows partition, so I know the cards and HDMI cable are working. But I can’t get this resolution on Fedora.
At first I was using Nouveau and Wayland. The correct resolution did not appear in Settings->Displays, and I saw in posts such as this that adding resolutions under Wayland is pretty involved. So I installed the proprietary NVIDIA driver through rpmfusion, thinking this might fix things by itself and if not at least I’d be back in Xorg and adding a resolution might be easier.
Installing the NVIDIA driver did not change anything, so I tried what I’ve seen in several posts:
gtf 2560 1440 60
xrandr --newmode "2560x1440_60.00" 311.83 2560 2744 3024 3488 1440 1441 1444 1490 -HSync +Vsync
xrandr --addmode HDMI-1 "2560x1440_60.00"
xrandr --output HDMI-1 --mode "2560x1440_60.00"
This last command results in a brief blank screen, no resolution change, and the error message xrandr: Configure crtc 0 failed
. These steps also result in the new resolution showing up in Settings->Displays, but selecting it there similarly results in a silent reversion to the previous resolution. (I read in some posts that underscores in mode names can be a problem, so I tried all the above with the name “newname” with the same results.)
Below are the results of cat /sys/class/drm/card0-HDMI-A-1/edid | edid-decode
. As you can see, the correct resolution does appear as DTD 1. Any ideas? Because the monitor and cards all seem mainstream, I figure I’m missing something basic.
00 ff ff ff ff ff ff 00 10 ac 01 d1 53 4c 47 30
13 1e 01 03 80 3c 22 78 ea 4c 55 a9 55 4d 9d 26
0f 50 54 a5 4b 00 81 00 b3 00 d1 00 71 4f a9 40
81 80 d1 c0 01 01 56 5e 00 a0 a0 a0 29 50 30 20
35 00 55 50 21 00 00 1a 00 00 00 ff 00 35 53 46
59 53 30 33 0a 20 20 20 20 20 00 00 00 fc 00 44
45 4c 4c 20 50 32 37 32 30 44 0a 20 00 00 00 fd
00 31 4b 1d 71 1c 00 0a 20 20 20 20 20 20 01 ad
02 03 1a b1 4f 90 05 04 03 02 07 16 01 06 11 12
15 13 14 1f 65 03 0c 00 10 00 02 3a 80 18 71 38
2d 40 58 2c 45 00 55 50 21 00 00 1e 01 1d 80 18
71 1c 16 20 58 2c 25 00 55 50 21 00 00 9e 7e 39
00 a0 80 38 1f 40 30 20 3a 00 55 50 21 00 00 1a
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 28
----------------
Block 0, Base EDID:
EDID Structure Version & Revision: 1.3
Vendor & Product Identification:
Manufacturer: DEL
Model: 53505
Serial Number: 809978963
Made in: week 19 of 2020
Basic Display Parameters & Features:
Digital display
Maximum image size: 60 cm x 34 cm
Gamma: 2.20
DPMS levels: Standby Suspend Off
RGB color display
First detailed timing is preferred timing
Color Characteristics:
Red : 0.6611, 0.3320
Green: 0.3037, 0.6132
Blue : 0.1494, 0.0595
White: 0.3134, 0.3291
Established Timings I & II:
IBM : 720x400 70.082 Hz 9:5 31.467 kHz 28.320 MHz
DMT 0x04: 640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz
DMT 0x06: 640x480 75.000 Hz 4:3 37.500 kHz 31.500 MHz
DMT 0x09: 800x600 60.317 Hz 4:3 37.879 kHz 40.000 MHz
DMT 0x0b: 800x600 75.000 Hz 4:3 46.875 kHz 49.500 MHz
DMT 0x10: 1024x768 60.004 Hz 4:3 48.363 kHz 65.000 MHz
DMT 0x12: 1024x768 75.029 Hz 4:3 60.023 kHz 78.750 MHz
DMT 0x24: 1280x1024 75.025 Hz 5:4 79.976 kHz 135.000 MHz
Standard Timings:
DMT 0x1c: 1280x800 59.810 Hz 16:10 49.702 kHz 83.500 MHz
DMT 0x3a: 1680x1050 59.954 Hz 16:10 65.290 kHz 146.250 MHz
DMT 0x45: 1920x1200 59.885 Hz 16:10 74.556 kHz 193.250 MHz
DMT 0x15: 1152x864 75.000 Hz 4:3 67.500 kHz 108.000 MHz
DMT 0x33: 1600x1200 60.000 Hz 4:3 75.000 kHz 162.000 MHz
DMT 0x23: 1280x1024 60.020 Hz 5:4 63.981 kHz 108.000 MHz
DMT 0x52: 1920x1080 60.000 Hz 16:9 67.500 kHz 148.500 MHz
Detailed Timing Descriptors:
DTD 1: 2560x1440 59.951 Hz 16:9 88.787 kHz 241.500 MHz (597 mm x 336 mm)
Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 5 Vback 33 Vpol N
Display Product Serial Number: '5SFYS03'
Display Product Name: 'DELL P2720D'
Display Range Limits:
Monitor ranges (GTF): 49-75 Hz V, 29-113 kHz H, max dotclock 280 MHz
Extension blocks: 1
Checksum: 0xad
----------------
Block 1, CTA-861 Extension Block:
Revision: 3
Underscans PC formats by default
Supports YCbCr 4:4:4
Supports YCbCr 4:2:2
Native detailed modes: 1
Video Data Block:
VIC 16: 1920x1080 60.000 Hz 16:9 67.500 kHz 148.500 MHz (native)
VIC 5: 1920x1080i 60.000 Hz 16:9 33.750 kHz 74.250 MHz
VIC 4: 1280x720 60.000 Hz 16:9 45.000 kHz 74.250 MHz
VIC 3: 720x480 59.940 Hz 16:9 31.469 kHz 27.000 MHz
VIC 2: 720x480 59.940 Hz 4:3 31.469 kHz 27.000 MHz
VIC 7: 1440x480i 59.940 Hz 16:9 15.734 kHz 27.000 MHz
VIC 22: 1440x576i 50.000 Hz 16:9 15.625 kHz 27.000 MHz
VIC 1: 640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz
VIC 6: 1440x480i 59.940 Hz 4:3 15.734 kHz 27.000 MHz
VIC 17: 720x576 50.000 Hz 4:3 31.250 kHz 27.000 MHz
VIC 18: 720x576 50.000 Hz 16:9 31.250 kHz 27.000 MHz
VIC 21: 1440x576i 50.000 Hz 4:3 15.625 kHz 27.000 MHz
VIC 19: 1280x720 50.000 Hz 16:9 37.500 kHz 74.250 MHz
VIC 20: 1920x1080i 50.000 Hz 16:9 28.125 kHz 74.250 MHz
VIC 31: 1920x1080 50.000 Hz 16:9 56.250 kHz 148.500 MHz
Vendor-Specific Data Block (HDMI), OUI 00-0C-03:
Source physical address: 1.0.0.0
Detailed Timing Descriptors:
DTD 2: 1920x1080 60.000 Hz 16:9 67.500 kHz 148.500 MHz (597 mm x 336 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 4 Vsync 5 Vback 36 Vpol P
DTD 3: 1920x1080i 60.000 Hz 16:9 33.750 kHz 74.250 MHz (597 mm x 336 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 2 Vsync 5 Vback 15 Vpol P Vfront +0.5 Odd Field
Vfront 2 Vsync 5 Vback 15 Vpol P Vback +0.5 Even Field
DTD 4: 2048x1080 59.998 Hz 256:135 66.658 kHz 147.180 MHz (597 mm x 336 mm)
Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 10 Vback 18 Vpol N
Checksum: 0x28