Am 03.04.2018 um 11:29 schrieb Daniel Vetter:
On Sun, Apr 01, 2018 at 10:12:10PM +0200, Christian König wrote:
Am 01.04.2018 um 20:21 schrieb Takashi Iwai:
[SNIP]
Well exactly that's the point, nothing.
The problem is that the option name is confusing to the end user because the
expectation is that "nomodeset" just means that they only can't change the
display mode.
Some (unfortunately quite a lot) people don't realize that for KMS drivers
this means that the driver isn't even loaded and they also don't get any
acceleration.
We had to explain that numerous times now. I think it would be best to give
the option a more meaningful name.
Yeah, agreed with Christian. If we want a generic "pls disable all gfx
accel" knob then probably best to put that into the drm core. And just
outright fail loading the drm core if that happens, which will prevent all
gfx drivers from loading.
That likely means a hole bunch of stuff won't work (usually sound keels
over too), but that's what you get for this. Only disabling modesetting
without disabling the entire driver doesn't work (never has, except for
this UMS+GEM combo only i915 support, and not for long).
And once we have that knob, probably best to phase out all the per-driver
options.
+ some compability code to keep "nomodeset" working for a while longer
and printing a warning that the option is deprecated.
If we approach it like that the whole idea sounds rather reasonable to me.
Christian.
-Daniel
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