Re: New machine - no virtual terminals
On Tue, 21 Mar 2023 17:14:44 -0400
"Steven A. Falco" <stevenfalco(a)gmail.com> wrote:
I think I'm finally getting somewhere with this problem.
My motherboard has a built-in VGA interface, which shows up as
"astdrmfb" on fb0. My AMD video card is "amdgpudrmfb" on fb1.
For some reason, the kernel uses fb1 for the graphical desktop, but
when I type Ctrl-Alt-F3 it switches to the VGA interface on fb0.
So my question is now probably simpler - I need to find a way to tell
the kernel to ignore fb0 completely, and just use fb1 for everything.
I'll do some searching to see if I can figure that out, but if
someone knows off the top of their head how to force a framebuffer to
be ignored, I'd appreciate it.
Is there a way to turn off the fb0 in the BIOS? Hit F2 or Del to get
into the bios while booting. Yours might be different, but I think
these are pretty standard.
Check the frame buffer configs in your kernel, /boot/config*.
Mine are
CONFIG_SYSFB=y
CONFIG_SYSFB_SIMPLEFB=y
CONFIG_DRM_FBDEV_EMULATION=y
CONFIG_DRM_FBDEV_OVERALLOC=200
CONFIG_FB_CMDLINE=y
CONFIG_FB_NOTIFY=y
CONFIG_FB=y
CONFIG_FB_DDC=m
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
CONFIG_FB_SYS_FILLRECT=m
CONFIG_FB_SYS_COPYAREA=m
CONFIG_FB_SYS_IMAGEBLIT=m
CONFIG_FB_SYS_FOPS=m
CONFIG_FB_DEFERRED_IO=y
CONFIG_FB_BACKLIGHT=m
CONFIG_FB_MODE_HELPERS=y
CONFIG_FB_VGA16=m
CONFIG_FB_VESA=y
CONFIG_FB_RADEON=m
CONFIG_FB_RADEON_I2C=y
CONFIG_FB_RADEON_BACKLIGHT=y
CONFIG_FB_SIMPLE=m
but I run a custom kernel, so yours could be significantly different.
You could compare a grep of the f38 kernel config that works with a
grep of the f37 kernel config that doesn't to see if there is a
difference in their framebuffer configuration.