no signal и переход монитора в ждущий режим без nomodeset.
773.099] (==) No Layout section. Using the first Screen section.
[ 773.099] (==) No screen section available. Using defaults.
[ 773.099] (**) |-->Screen "Default Screen Section" (0)
[ 773.099] (**) | |-->Monitor "<default monitor>"
[ 773.099] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
...
(--) PCI:*(1@0:0:0) 1002:68f9:1002:010a rev 0, Mem @ 0xe0000000/268435456, 0xfea20000/131072, I/O @ 0x0000e000/256, BIOS @ 0x????????/131072
[ 773.108] (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
...
[ 773.111] (==) Matched ati as autoconfigured driver 0
[ 773.111] (==) Matched modesetting as autoconfigured driver 1
[ 773.111] (==) Matched fbdev as autoconfigured driver 2
[ 773.111] (==) Matched vesa as autoconfigured driver 3
[ 773.111] (==) Assigned the driver to the xf86ConfigLayout
[ 773.111] (II) LoadModule: "ati"
...
[ 773.138] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[ 773.139] (II) FBDEV: driver for framebuffer: fbdev
[ 773.139] (II) VESA: driver for VESA chipsets: vesa
[ 773.139] (II) [KMS] drm report modesetting isn't supported.
[ 773.139] (EE) open /dev/dri/card0: No such file or directory
[ 773.139] (WW) Falling back to old probe method for modesetting
[ 773.139] (EE) open /dev/dri/card0: No such file or directory
[ 773.139] (II) Loading sub module "fbdevhw"
[ 773.139] (II) LoadModule: "fbdevhw"
...
[ 773.139] (EE) Unable to find a valid framebuffer device
[ 773.139] (WW) Falling back to old probe method for fbdev
[ 773.139] (II) Loading sub module "fbdevhw"
...
[ 773.140] (II) FBDEV(3): using default device
[ 773.140] vesa: Refusing to run on UEFI
[ 773.140] (EE) Screen 0 deleted because of no matching config section.
[ 773.140] (II) UnloadModule: "radeon"
[ 773.140] (EE) Screen 0 deleted because of no matching config section.
[ 773.140] (II) UnloadModule: "modesetting"
[ 773.140] (EE) Screen 0 deleted because of no matching config section.
[ 773.140] (II) UnloadModule: "fbdev"
[ 773.140] (II) UnloadSubModule: "fbdevhw"
[ 773.140] (II) FBDEV(0): Creating default Display subsection in Screen section "Default Screen Section" for depth/fbbpp 24/32
...
(II) FBDEV(0): hardware: EFI VGA (video memory: (пишет размер оперативки) kB)
[ 773.140] (DB) xf86MergeOutputClassOptions unsupported bus type 0
...
(II) AIGLX: Screen 0 is not DRI2 capable
[ 0.613822] fb0: EFI VGA frame buffer device
[ 1.962298] ACPI: video: Video Device [VGA1] (multi-head: yes rom: no post: no)
[ 1.969617] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.PB21.VGA.LCD._BCM.AFN7], AE_NOT_FOUND (20210730/psargs-330)
[ 1.969631] ACPI Error: Aborting method \_SB.PCI0.PB21.VGA.LCD._BCM due to previous error (AE_NOT_FOUND) (20210730/psparse-529)
[ 1.969639] ACPI: \_SB_.PCI0.PB21.VGA_.LCD_: _BCM evaluation failed
[ 2.330719] [drm] VGACON disable radeon kernel modesetting.
[ 14.031403] [drm] VGACON disable radeon kernel modesetting.
xrandr: Failed to get size of gamma for output default Screen 0: minimum 1024 x 768, current 1024 x 768, maximum 1024 x 768 default connected primary 1024x768+0+0 0mm x 0mm 1024x768 76.00*