I runned cat Xorg.0.log | grep -n 'WW' and cat Xorg.0.log | grep -n 'EE'. and this is the result.
15: (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
27:[ 36.195] (WW) The directory "/usr/local/lib/X11/fonts/OTF/" does not exist.
29:[ 36.195] (WW) The directory "/usr/local/lib/X11/fonts/100dpi/" does not exist.
46:[ 36.211] (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
60:[ 36.229] (WW) Warning, couldn't open module nouveau
63:[ 36.229] (EE) Failed to load module "nouveau" (module does not exist, 0)
65:[ 36.230] (WW) Warning, couldn't open module nv
68:[ 36.230] (EE) Failed to load module "nv" (module does not exist, 0)
92:[ 36.248] (EE) open /dev/dri/card0: No such file or directory
93:[ 36.248] (WW) Falling back to old probe method for modesetting
94:[ 36.248] (EE) open /dev/dri/card0: No such file or directory
101:[ 36.274] (EE) open /dev/fb0: No such device
102:[ 36.274] (WW) Falling back to old probe method for fbdev
109:[ 36.302] (EE) open /dev/fb0: No such device
110:[ 36.302] (EE) Screen 0 deleted because of no matching config section.
112:[ 36.302] (EE) Screen 0 deleted because of no matching config section.
1206:[ 37.759] (WW) VESA(0): Unable to estimate virtual size
1215:[ 37.759] (WW) VESA(0): No valid modes left. Trying less strict filter...
1219:[ 37.759] (WW) VESA(0): Unable to estimate virtual size
1271:[ 38.632] (EE) AIGLX: reverting to software rendering
1272:[ 38.632] (EE) AIGLX error: dlopen of /usr/local/lib/dri/swrast_dri.so failed (/usr/local/lib/dri/swrast_dri.so: cannot open shared object file: No such file or directory)
1273:[ 38.632] (EE) GLX: could not load software renderer
1468:[ 40.741] (EE) AIGLX: reverting to software rendering
1469:[ 40.741] (EE) AIGLX error: dlopen of /usr/local/lib/dri/swrast_dri.so failed (/usr/local/lib/dri/swrast_dri.so: cannot open shared object file: No such file or directory)
1470:[ 40.741] (EE) GLX: could not load software renderer
I thought I should use Xorg on console as I saw a post saying I could use something like Xorg & xrandr -s 800x600.