AMD/AMD hybrid graphics

[Boszormenyi Zoltan]

2014-02-19 10:59 keltezéssel, Michel Dänzer írta:
> On Mit, 2014-02-19 at 09:11 +0100, Boszormenyi Zoltan wrote:
>> On second thought, the usage of VESA for installation and then
>> switching to KMS might have caused the mixed behaviour, i.e. that
>> the kernel recognized and initialized both chips but X used only the
>> integrated one. But I don't want to reinstall the system to test
>> this theory.
> I doubt it would make any difference.
>
>
>> Now, with the "Switchable" state, RADEON(0) lines (for ARUBA) and
>> RADEON(G0) lines (for HAINAN) are present.
> [...]
>> I would like to have PRIME functional so I will need to set "Switchable
>> Graphics" in the BIOS. What xorg.conf magic should I add to make it
>> use the ARUBA chip for display but still keep HAINAN active for PRIME?
> According to the screen enumeration above, that's already the case.

I see.

> https://bugs.freedesktop.org/show_bug.cgi?id=69694 may be helpful for
> troubleshooting the crash.

I looked at it and the symptoms from comment 17 and comment 19
(blank screen with only the cursor visible) looks like it's very similar
to my case. Only when removing the "quiet" kernel command line option,
more is left visible on the screen, not just the cursor.

>> Can Mesa/Xorg use both r600g and radeonsi at the same time?
> Yes, that seems to work fine for others. You may need Mesa 10.1 or newer
> though.

Do you mean mean with Mesa 9.2.5 and Xorg server 1.14.4 in
Fedora 20 at this time, it's not possible unless I compile my own
llvm-3.5 SVN, Mesa 10.1 or 10.2 GIT and Xorg 1.15 GIT?

I tried to upgrade to rawhide at least in part:

[zozo at localhost ~]$ rpm -q kernel mesa-libGL xorg-x11-server-Xorg llvm-libs
kernel-3.13.3-201.fc20.x86_64
mesa-libGL-10.1-0.rc1.20140208.fc21.x86_64
mesa-libGL-10.1-0.rc1.20140208.fc21.i686
xorg-x11-server-Xorg-1.15.0-3.fc21.x86_64
llvm-libs-3.4-4.fc21.x86_64
llvm-libs-3.4-4.fc21.i686

I still get the same problem. Attached is the log from both 1.14.4 (FC20)
and 1.15.0 (rawhide), with this change so the timing info is cut off from
the beginning of each line to make it easier to produce a diff between
the two files:

[zozo at localhost ~]$ cat Xorg.0.log.hainan-active | cut -d ']' -f 2- 
 >Xorg.0.log.hainan-active-no-timing
[zozo at localhost ~]$ cat /var/log/Xorg.0.log | cut -d ']' -f 2- 
 >Xorg.0.log.hainan-active-no-timing-1.15

Best regards,
Zoltán Böszörményi

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