[Bug 81382] Text console blanking does not go away

https://bugs.freedesktop.org/show_bug.cgi?id=81382

--- Comment #12 from Daniel Kirsten daniel-kirsten-72@excite.com --- (In reply to comment #11)

I've got the same notebook as Daniel Kirsten,

They sold different Amilo Xi 2550, there are even some Amilo Xi 2550 with an Nvidia graphic card.

If I change /sys/class/backlight/radeon_bl0/brightness or /sys/class/backlight/acpi_video0 the display stayes dark.

I can control brightness by writing 0-7 into /sys/class/backlight/acpi_video0/brightness

You should comment out lines 233-234 in drivers/gpu/drm/radeon/atombios_encoders.c, i.e.,

/* if (bd->props.brightness == 0) 234 bd->props.brightness = RADEON_MAX_BL_LEVEL; */

then it works.

Daniel