[Bug 30620] KMS on RS100: no display on VGA

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=30620

--- Comment #11 from Rafał Miłecki <zajec5 at gmail.com> 2010-10-16 00:58:35 PDT ---
(In reply to comment #9)
> Does the following fix kms/ums?
> radeontool regset 0x0284 0x00230000

I got false positive report about this :(

What I asked for was executing:
1) Boot without vga=... and with radeon.modeset=0 3
2) Executing rmmod radeon
3) Executing:
modprobe radeon modeset=1; sleep 5s; radeontool regset 0x0284 0x00230000

I got response monitor gone black and then came on again. But I now I know it
has happened after 1s, not 5s! It seems loading radeon this one time didn't
break VGA output.

Maybe some register survived reboot? Maybe regs dumps are not clean actually,
maybe I should ask to grab them from cold boot? :|

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