Re: Xorg fails on ATI after update (mmio aperture)
Hi Riccardo!
On 03/24/2017 10:30 AM, Riccardo Mottola wrote:
> I used the debian supplied config except the IO strict devmem setting.
> It took almost 2 days to build on the iBook using a SSD! :)
>
> X11 now works, so this is the proof.
> Furthermore the description says that the setting is incompatible with with legacy Xorg, which is the one I am using.
Yes, indeed. Thanks for verifying this. Glad to hear you figured out
how to get X.Org working on your machine again.
> Adrian, can you open the bug or should I, where ?
That's actually a difficult question. Looking at what the option does,
it's actually a security feature [1] and disabling it would take away
security for a lot of users.
Quoting:
> If this option is disabled, you allow userspace (root) access to all
> io-memory regardless of whether a driver is actively using that range.
> Accidental access to this is obviously disastrous, but specific access
> can be used by people debugging kernel drivers.
Allowing this configuration in the default kernel sounds like a very bad
idea and I don't think Debian's kernel maintainers will agree to change
this setting.
I'm afraid you will have to keep building your kernel from source.
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer - glaubitz@debian.org
`. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
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