[Bug 102008] DRI_PRIME causes X Error of failed request: BadAlloc (insufficient resources for operation)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102008

--- Comment #2 from bartos.petr at gmail.com ---
So I have some partial results.

First problem I've encoutered is that I had to use patch from
https://bugs.freedesktop.org/show_bug.cgi?id=101774 in order to be able to
build mesa between 7250cbafb90271579a1d07160498e902996cbc97 and
5ffe0c9e1be0257de1943135244419cbc86a6d84 so I hope it does not affect these
results.

Second problem I found is that problem is connected with using modesetting DDX
drivers, and between working and non-working commits is some problem causing
segfault with modesetting drivers (X do not start). So I have tested not only
particular commits, but also DDX driver combinations:

intel - IGPU, DRI3, SNA accel
radeon - DGPU, DRI3, glamor accel
modesetting - both, default settings

So far I managed to find this (I have not finished bisecting yet, so these
commits are ones I've found so far):

f33d8af7aa354d00808f8bfd55028c396c706635
    intel, radeon - OK
    intel, modesetting - OK
    modesetting, radeon - ERROR
    modesetting, modesetting - ERROR

81fb1547772d42c527318837d4207ecdb6899e5d
    intel, radeon - OK
    intel, modesetting - SEGFAULT
    modesetting, radeon - SEGFAULT
    modesetting, modesetting - SEGFAULT

3645268748c44825ce8d37bf03f684731eb2652a
    intel, radeon - OK
    intel, modesetting - SEGFAULT
    modesetting, radeon - SEGFAULT
    modesetting, modesetting - SEGFAULT

84ed8b67c56b323cd834d463151e1a3c0430c53e
    intel, radeon - OK
    intel, modesetting - OK
    modesetting, radeon - OK
    modesetting, modesetting - OK

So it seems between somewhere between 84ed8b67c56b323cd834d463151e1a3c0430c53e
and f33d8af7aa354d00808f8bfd55028c396c706635
(https://cgit.freedesktop.org/mesa/mesa/log/?qt=range&q=84ed8b67c56b323cd834d463151e1a3c0430c53e..f33d8af7aa354d00808f8bfd55028c396c706635)
modesetting driver started to segfault which was fixed, but this fix probably
also caused problem which I have reported.

It also seems there is no problem when using only intel+radeon DDX drivers.

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