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This was commonly used in the > 1990s and earlier for debugging software which took over the primary > display. It is highly unlikely anyone is doing so nowadays because > serial consoles and much better methods of debugging exist. >=20 > The driver is not enabled by any defconfig, nor any of the > dozens of distro configs collected at [1]. It has been relegated to VTs > 13-16 since commit 0b9cf3aa6b1e ("mdacon messing up default vc's - set > default to vc13-16 again") in Linux 2.6.27 (and before Linux 2.5.53 - > see the link in the message of the above commit). The change in 2.6.27 > was done because it was incorrectly detecting non-MDA adapters as MDA > and taking over all VTs, rendering them unusable. >=20 > Furthermore, vgacon supports using MDA/Hercules-compatible adapters as > the primary text console, so any systems with only one of these > adapters were already using vgacon and will not experience any loss in > functionality from the removal of this driver. >=20 > Given all of these factors, the mdacon driver is likely entirely > unused. Remove it. I've applied this patch to the fbdev git tree, since I also believe that there is no use case or user left (with Linux kernels >=3D 7.0), which use= s the mdacon. If someone thinks we need to keep it, please speak up. Helge >=20 > [1] https://github.com/nyrahul/linux-kernel-configs/tree/f0bee86a135a040= 6ea427855f52702dd00d770f9 >=20 > Signed-off-by: Ethan Nelson-Moore > --- > .../admin-guide/kernel-parameters.txt | 5 - > arch/alpha/kernel/io.c | 2 +- > arch/powerpc/include/asm/vga.h | 4 +- > drivers/tty/vt/vt.c | 3 - > drivers/video/console/Kconfig | 15 - > drivers/video/console/Makefile | 1 - > drivers/video/console/mdacon.c | 566 ------------------ > include/linux/console.h | 2 - > include/linux/vt_buffer.h | 2 +- > 9 files changed, 4 insertions(+), 596 deletions(-) > delete mode 100644 drivers/video/console/mdacon.c