[Bug 14832] Corrupt secondary display with xrandr dual screen ( Radeon Xpress 200M)

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Mar 20 12:50:05 PDT 2008


--- Comment #12 from Alex Deucher <agd5f at yahoo.com>  2008-03-20 12:50:05 PST ---
Just as I suspected, it looks like the fifo regs:
-RS480_UNK_e38 (0e38)   0x8000021b
-RS480_UNK_e3c (0e3c)   0x000004d2
+RS480_UNK_e38 (0e38)   0x800001b0
+RS480_UNK_e3c (0e3c)   0x0000295c

does the following help (when the screen is corrupt):
radeontool regset RS480_UNK_e38 0x8000021b
radeontool regset RS480_UNK_e3c 0x000004d2

you may want to do a dpms cycle after you change them (xset dpms force off).

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