Re (4): Display on IBM ThinkPad A22m
- From: peasthope@xxxxxxx
- Date: Sun, 5 Aug 2012 14:56:59 -0700
* From: Henrique de Moraes Holschuh <hmh@xxxxxxxxxx>
* Date: Tue, 17 Jul 2012 21:11:20 -0300
Contact him directly, it is probably the only way.
For anyone else interested in the r128 this is Connor's
reply.
... radeon driver as of 2005 had a lot of obsolete code for mode
validation. I assume this code is still in r128. At some time between
2005 and 2012 when UMS was dropped, radeon got switched over to a
different type of UMS that used functions in the X server that are more
correct. Fixing this sounds like quite a project.
...
I'm pretty sure the problem has been solved for UMS and KMS. It's just
that the KMS solution in the current radeon driver wouldn't be
applicable to r128 unless we also edit the r128 kernel module to support
KMS (something I hope to do eventually). Radeon has seen a progression
from "old UMS code" -> "new UMS code" -> KMS while r128 is still stuck
with old UMS code. Getting it to use new UMS code seems like the more
realistic thing to do. And if I learn a decent amount of stuff from that
effort, I might know enough to try KMS after.
So in some aspects, r128 is significantly outdated; there is plenty of work
for anyone interested. Meanwhile a working VESA driver could be better than
broken other driver.
Regards, ... Peter E.
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