On Wed, 26 May 2004, Keith Whitwell wrote:
Vladimir Dergachev wrote:
Hi Nikolai,
I merged your patches - thank you very much !
I wonder if a similar approach could allow us to reset the radeon/r200 after lockups?
Well, Nikolai's patch is not specific to R300 - it uses plain Radeon registers.
There's historically been code which tried to do that, but it just never ever worked...
I always thought that the code did work, however since the reset usually happened in DRM driver it did not know how to set the mode. There were quite a few occasions where I was able to kill X and then restart it.
(though on other occasions killing X resulted in hard lockup).
What's different in Nikolai's patch is that the reset is initiated by X itself.
It might be that the lockup was due to clocks being switched off, but the DAC left active - or something similar.
best
Vladimir Dergachev
Keith
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