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Lower screen resolution 1600x1200 does not fill the area of the Dasung HD-F e-ink monitor in Fedora 34

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I bought the Dasung HD-F 2019 e-ink monitor. The default screen resolution is 2200x1650 @ 40. Dasung also supports 1600x1200 @ 60 and I would like to use that. Unfortunately, the screen does not fill completely in Fedora 34. My notebook has Intel UHD Graphics 620. I don't know where the problem is, but my guess is that the system thinks Dasung is 20x15 cm in size. In fact, it is 27x20 cm. Filled area is exactly 20x15 cm. I completely do not know how to configure monitors in Linux in an advanced way. I spent many hours reading and trying different ways. Photo of Dasung with 1600x1200 What I did (using some tutorials): I made hex dump of edid and replaced 20x15 cm with 27x20 cm (offset 0x15 and 0x16). Changed offset 0x7f to the new checksum. Copied file to /lib/firmware/edid/correct-edid.bin. Created Dracut configuration /etc/dracut.conf.d/00-dasung-hdf-edid.conf to copy the new EDID into initramfs: > install_items+=" /lib/firmware/edid/correct-edid.bin " Regenerated initramfs using Dracut: sudo dracut -f. Added drm.edid_firmware=HDMI-A-1:edid/correct-edid.bin to the end of GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub. At the end: sudo grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg Unfortunately it didn't help. Result of xrandr --verbose:
Screen 0: minimum 320 x 200, current 2200 x 2730, maximum 16384 x 16384
eDP-1 connected primary 1920x1080+0+1650 (0x47) normal (normal left inverted right x axis y axis) 309mm x 174mm
	Identifier: 0x42
	Timestamp:  242415
	Subpixel:   unknown
	Gamma:      1.0:1.0:1.0
	Brightness: 1.0
	Clones:    
	CRTC:       0
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	_MUTTER_PRESENTATION_OUTPUT: 0 
	EDID: 
		00ffffffffffff0006af3d3200000000
		101c0104a51f117802fc15a055509b27
		0c505400000001010101010101010101
		010101010101143780b8703824401010
		3e0035ae100000180000000f00000000
		00000000000000000020000000fe0041
		554f0a202020202020202020000000fe
		004231343048414e30332e32200a00bd
	scaling mode: Full aspect 
		supported: Full, Center, Full aspect
	Colorspace: Default 
		supported: Default, RGB_Wide_Gamut_Fixed_Point, RGB_Wide_Gamut_Floating_Point, opRGB, DCI-P3_RGB_D65, BT2020_RGB, BT601_YCC, BT709_YCC, XVYCC_601, XVYCC_709, SYCC_601, opYCC_601, BT2020_CYCC, BT2020_YCC
	max bpc: 12 
		range: (6, 12)
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	panel orientation: Normal 
		supported: Normal, Upside Down, Left Side Up, Right Side Up
	link-status: Good 
		supported: Good, Bad
	CONNECTOR_ID: 95 
		supported: 95
	non-desktop: 0 
		range: (0, 1)
  1920x1080 (0x45) 141.000MHz -HSync -VSync +preferred
        h: width  1920 start 1936 end 1952 total 2104 skew    0 clock  67.02KHz
        v: height 1080 start 1083 end 1097 total 1116           clock  60.05Hz

    



HDMI-1 connected 2200x1650+0+0 (0x7b2) normal (normal left inverted right x axis y axis) 200mm x 150mm
	Identifier: 0x43
	Timestamp:  242415
	Subpixel:   unknown
	Gamma:      1.0:1.0:1.0
	Brightness: 1.0
	Clones:    
	CRTC:       1
	CRTCs:      0 1 2
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	_MUTTER_PRESENTATION_OUTPUT: 0 
	EDID: 
		00ffffffffffff001263010000000000
		0a1d0103801b14782a08a5a2574fa228   <--- 1b14 (27 x 20 cm) is my own change
		0f505400000001010101010101010101        using custom edid file, before
		010101010101c13e98a880722e603820        it was 140f (20 x 15 cm)
		3600c8960000001e0000001000000000
		00000000000000000000000000fc0050
		617065726c696b6520482044483f4030
		62b0324040c013006d552100001e00c5
	HDCP Content Type: HDCP Type0 
		supported: HDCP Type0, HDCP Type1
	Content Protection: Undesired 
		supported: Undesired, Desired, Enabled
	max bpc: 12 
		range: (8, 12)
	content type: No Data 
		supported: No Data, Graphics, Photo, Cinema, Game
	Colorspace: Default 
		supported: Default, SMPTE_170M_YCC, BT709_YCC, XVYCC_601, XVYCC_709, SYCC_601, opYCC_601, opRGB, BT2020_CYCC, BT2020_RGB, BT2020_YCC, DCI-P3_RGB_D65, DCI-P3_RGB_Theater
	aspect ratio: Automatic 
		supported: Automatic, 4:3, 16:9
	Broadcast RGB: Automatic 
		supported: Automatic, Full, Limited 16:235
	audio: auto 
		supported: force-dvi, off, auto, on
	link-status: Good 
		supported: Good, Bad
	CONNECTOR_ID: 103 
		supported: 103
	non-desktop: 0 
		range: (0, 1)
  2200x1650 (0x7b2) 160.650MHz +HSync +VSync *current +preferred
        h: width  2200 start 2256 end 2288 total 2368 skew    0 clock  67.84KHz
        v: height 1650 start 1653 end 1659 total 1696           clock  40.00Hz
  1600x1200 (0x7b3) 162.000MHz +HSync +VSync
        h: width  1600 start 1664 end 1856 total 2160 skew    0 clock  75.00KHz
        v: height 1200 start 1201 end 1204 total 1250           clock  60.00Hz
Result of edid-decode < /sys/class/drm/card0-HDMI-A-1/edid:
edid-decode (hex):

00 ff ff ff ff ff ff 00 12 63 01 00 00 00 00 00
0a 1d 01 03 80 1b 14 78 2a 08 a5 a2 57 4f a2 28   <--- 1b14 (27 x 20 cm) is my own change
0f 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01        using custom edid file, before
01 01 01 01 01 01 c1 3e 98 a8 80 72 2e 60 38 20        it was 140f (20 x 15 cm)
36 00 c8 96 00 00 00 1e 00 00 00 10 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 fc 00 50
61 70 65 72 6c 69 6b 65 20 48 20 44 48 3f 40 30
62 b0 32 40 40 c0 13 00 6d 55 21 00 00 1e 00 c5

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

Block 0, Base EDID:
  EDID Structure Version & Revision: 1.3
  Vendor & Product Identification:
    Manufacturer: DSC
    Model: 1
    Made in: week 10 of 2019
  Basic Display Parameters & Features:
    Digital display
    Maximum image size: 27 cm x 20 cm    <--- before my changes it was 20x15
    Gamma: 2.20
    DPMS levels: Off
    RGB color display
    First detailed timing is the preferred timing
  Color Characteristics:
    Red  : 0.6328, 0.3398
    Green: 0.3105, 0.6328
    Blue : 0.1582, 0.0605
    White: 0.3134, 0.3291
  Established Timings I & II: none
  Standard Timings: none
  Detailed Timing Descriptors:
    DTD 1:  2200x1650   40.001 Hz   4:3    67.842 kHz  160.650 MHz (200 mm x 150 mm)
                 Hfront   56 Hsync  32 Hback  80 Hpol P
                 Vfront    3 Vsync   6 Vback  37 Vpol P
    Dummy Descriptor:
    Display Product Name: 'Paperlike H D'
    DTD 2:  1600x1200   60.000 Hz   4:3    75.000 kHz  162.000 MHz (621 mm x 341 mm)
                 Hfront   64 Hsync 192 Hback 304 Hpol P
                 Vfront    1 Vsync   3 Vback  46 Vpol P
Checksum: 0xc5
In Windows 10 everything works fine. I will be grateful for your help.
Asked by amarel (21 rep)
Jul 7, 2021, 09:56 PM
Last activity: Aug 1, 2021, 05:39 PM