Nope, no dice. Doom, Doom II, Evilution, and Plutonia never let me quit. I tried adding that line to Doom.gpe:
#!/bin/sh
echo 2 > /proc/cpu/alignment
./pollux_dpc_set 'lcd_timings=397,1,37,277,341,0,17,337;clkdiv0=9'
./prboom -config prboom.cfg -iwad doom1.wad > prboom.log.txt 2>&1
sync
cd...