Hello, all.
antiX Linux failed to autodetect and set the native
resolution of my monitor, probably because of incorrect EDID
information or a physical defect in EDID communication
between display and GPU. I solved this problem for X11 by
manual specification of driver and resolution in xorg.conf,
but my virtual terminals -- or whatver is the term for the
consoles accessible by CTRL+ALT+Fn -- still work in the
wrong resolution, likely 1024x768. Can you help me configure
the right one?
To begin with, the machine in question is Newsmay AC8:
http://www.newsmaytech.com/product/showproduct.php?lang=en&id=74
It is connected to my Iyama ProLite E1902S display via VGA.
The display's native resolution is 1280x1024. Here is my
full inxi dump:
https://pastebin.com/raw/7vA4ftUX
of which the interesitng part is:
Device-1: Intel JasperLake [UHD Graphics] driver: i915 v: kernel
arch: Gen11 ports: active: DP-2 empty: DP-1,HDMI-A-1 bus-ID: 00:02.0
chip-ID: 8086:4e61 class-ID: 0300
Display: server: X.Org v: 1.20.11 driver: X: loaded: modesetting
gpu: i915 display-ID: :0.0 screens: 1
Screen-1: 0 s-res: 1280x1024 s-dpi: 96 s-size: 338x270mm (13.31x10.63")
s-diag: 433mm (17.03")
Monitor-1: DP-2 model-id: RGT 0x1252 serial: 16843009 res: 1280x1024
hz: 75 dpi: 203 size: 160x90mm (6.3x3.54") diag: 1168mm (46") modes:
max: 1024x768 min: 720x400
OpenGL: renderer: Mesa Intel UHD Graphics (JSL) v: 4.6 Mesa 20.3.5
direct render: Yes
Observe the discrepancy between a max resolution of 1024x768
and the actual resolution of 1280x1024 (the dump was
collected from an X terminal emulator). I belive the first
value is due to broken EDID.
While running in X, my display reports its mode as 1280x1024
at 75Hz, So my first impulse was to force that resulution
via the corresponding GRUB parameter:
GRUB_GFXMODE=1280x1024
which failing, I logged on to GRUB and asked it what was the
matter:
grub> vbeinfo
error: can't find command 'vbeinfo'
grub> videoinfo
Adapter 'Cirrus CLGD 5446 PCI Video Driver': No info available
Adapter 'Bochs PCI Video Driver': No info available
Adapter 'EFI GOP dirver':
* 0x000 1024 x 768 x 32 ...
0x001 640 x 480 x 32 ...
0x002 800 x 600 x 32 ...
EDID version: 1.4
Preferred mode: 1024x768
If this may explain my failure to set 1280x1024 in the
console, what can I do make the resolution available?
According to the kernel log (dmesg), the correct
framebuffer/DRM driver is loaded:
fbcon: Taking over console
fbcon: i915drmfb (fb0) is primary device
With the drm.debug=0xe kernel parameter, I see the following
messages at startup
https://pastebin.com/raw/ebnCTBU2
including these:
[ 3.141586] [drm:drm_helper_probe_single_connector_modes [drm_kms_helper]] [CONNECTOR:233:DP-2] probed modes :
[ 3.141594] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1024x768": 60 65000 1024 1048 1184 1344 768 771 777 806 0x48 0x5
[ 3.141600] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1920x1080": 60 148500 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0xa
[ 3.141606] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1400x1050": 60 121750 1400 1488 1632 1864 1050 1053 1057 1089 0x40 0x6
[ 3.141612] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1600x900": 60 108000 1600 1624 1704 1800 900 901 904 1000 0x40 0x5
[ 3.141617] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1280x1024": 75 135000 1280 1296 1440 1688 1024 1025 1028 1066 0x40 0x5
[ 3.141623] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1280x1024": 60 108000 1280 1328 1440 1688 1024 1025 1028 1066 0x40 0x5
[ 3.141628] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1440x900": 60 106500 1440 1520 1672 1904 900 903 909 934 0x40 0x6
[ 3.141633] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1280x960": 60 108000 1280 1376 1488 1800 960 961 964 1000 0x40 0x5
[ 3.141639] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1366x768": 60 85500 1366 1414 1557 1792 768 769 796 798 0x40 0x5
[ 3.141644] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1280x800": 60 83500 1280 1344 1472 1680 800 801 829 831 0x40 0x5
[ 3.141650] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1152x864": 75 108000 1152 1216 1344 1600 864 865 868 900 0x40 0x5
[ 3.141655] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1280x768": 60 79500 1280 1328 1456 1664 768 769 796 798 0x40 0x5
[ 3.141660] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1280x720": 60 74250 1280 1390 1430 1650 720 725 730 750 0x40 0x5
[ 3.141666] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1024x768": 75 78750 1024 1040 1136 1312 768 769 772 800 0x40 0x5
[ 3.141671] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1024x768": 70 75000 1024 1048 1184 1328 768 771 777 806 0x40 0xa
[ 3.141676] [drm:drm_mode_debug_printmodeline [drm]] Modeline "1024x768": 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
[ 3.141770] [drm:drm_mode_debug_printmodeline [drm]] Modeline "832x624": 75 57284 832 864 928 1152 624 625 628 667 0x40 0xa
[ 3.141776] [drm:drm_mode_debug_printmodeline [drm]] Modeline "800x600": 75 49500 800 816 896 1056 600 601 604 625 0x40 0x5
[ 3.141781] [drm:drm_mode_debug_printmodeline [drm]] Modeline "800x600": 72 50000 800 856 976 1040 600 637 643 666 0x40 0x5
[ 3.141875] [drm:drm_mode_debug_printmodeline [drm]] Modeline "800x600": 60 40000 800 840 968 1056 600 601 605 628 0x40 0x5
[ 3.141881] [drm:drm_mode_debug_printmodeline [drm]] Modeline "640x480": 75 31500 640 656 720 840 480 481 484 500 0x40 0xa
[ 3.141886] [drm:drm_mode_debug_printmodeline [drm]] Modeline "640x480": 73 31500 640 664 704 832 480 489 492 520 0x40 0xa
[ 3.141892] [drm:drm_mode_debug_printmodeline [drm]] Modeline "640x480": 67 30240 640 704 768 864 480 483 486 525 0x40 0xa
[ 3.141897] [drm:drm_mode_debug_printmodeline [drm]] Modeline "640x480": 60 25175 640 656 752 800 480 490 492 525 0x40 0xa
[ 3.141902] [drm:drm_mode_debug_printmodeline [drm]] Modeline "720x400": 70 28320 720 738 846 900 400 412 414 449 0x40 0x6
[ 3.141909] [drm:drm_client_modeset_probe [drm]] connector 215 enabled? no
[ 3.141915] [drm:drm_client_modeset_probe [drm]] connector 225 enabled? no
[ 3.141921] [drm:drm_client_modeset_probe [drm]] connector 233 enabled? yes
[ 3.141931] [drm:drm_client_modeset_probe [drm]] Not using firmware configuration
[ 3.141938] [drm:drm_client_modeset_probe [drm]] looking for cmdline mode on connector 233
[ 3.141943] [drm:drm_client_modeset_probe [drm]] looking for preferred mode on connector 233 0
[ 3.141948] [drm:drm_client_modeset_probe [drm]] found mode 1024x768
[ 3.141954] [drm:drm_client_modeset_probe [drm]] picking CRTCs for 16384x16384 config
[ 3.141960] [drm:drm_client_modeset_probe [drm]] desired mode 1024x768 set on crtc 91 (0,0)
An attempt to set the native resolution via `fbset' fails as
well:
$ fbset 1280x1024-75
ioctl FBIOPUT_VSCREENINFO: Invalid argument
with the following in the kernel log:
[ 1377.941980] i915 0000:00:02.0: [drm:drm_fb_helper_check_var [drm_kms_helper]] fbdev emulation doesn't support changing the pixel clock, value of pixclock is ignored
[ 1377.941986] i915 0000:00:02.0: [drm:drm_fb_helper_check_var [drm_kms_helper]] fb requested width/height/bpp can't fit in current fb request 1280x1024-32 (virtual 1280x1024) > 1024x768-32
With similar success, I have tried `fbset' with various
1280x1024 modes pre-registered in /etc/fb.modes, as well as
with ones generated by gtf(1), with 8-, 24, and 32-bit
color.
The following futher confirms that only 1024x768 is
available for my consoles:
$ cat /sys/class/graphics/fb0/modes
U:1024x768p-0
whereas
cat /sys/class/graphics/fb0/mode
prints nothing.
Setting the desired mode directly fails:
$ sudo echo U:1280x1024p-0 > /sys/class/graphics/fb0/mode
-bash: /sys/class/graphics/fb0/mode: Permission denied
Just in case, I have made certain that my consoles 1..6 are
mapped to the framebuffer device:
$ con2fbmap 1
console 1 is mapped to framebuffer 0
In desperation, I have tried setting the obsolete `vga'
kernel parameter to 775, 794, and 795, but also in vain.
This above largely exhausts the advice and information I
have found concerning the configuration of the
framebuffer/drm graphical consoles, so I find myself in
need of your help in identifying the problem.
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