Unable to force use VESA driver via xorg.conf
I want to use VESA driver instead regular driver ("radeon") for testing
xorg.conf
Section "Device"
Identifier "VESA"
Driver "vesa"
EndSection
But Xorg fails to load with error:
[ 1077.700] (II) LoadModule: "vesa"
[ 1077.701] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[ 1077.701] (II) Module vesa: vendor="X.Org Foundation"
[ 1077.701] compiled for 1.21.1.9, module version = 2.6.0
[ 1077.701] Module class: X.Org Video Driver
[ 1077.701] ABI class: X.Org Video Driver, version 25.2
[ 1077.701] (II) VESA: driver for VESA chipsets: vesa
[ 1077.702] vesa: Refusing to run, Framebuffer or dri device present
[ 1077.702] (EE) No devices detected.
[ 1077.702] (EE)
Fatal server error:
[ 1077.702] (EE) no screens found(EE)
[ 1077.702] (EE)