Date: Thu, 26 Nov 2015 11:40:00 +0200 From: Andriy Gapon <avg@FreeBSD.org> To: freebsd-x11 <freebsd-x11@FreeBSD.org> Cc: =?UTF-8?Q?Jean-S=c3=a9bastien_P=c3=a9dron?= <dumbbell@FreeBSD.org> Subject: problem with discrete video card Message-ID: <5656D370.1090008@FreeBSD.org>
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I've been given a Radeon 6850 based video card that supposedly used to work. But for me it works only in the text mode. Any attempt to use it with radeonkms driver results in a reboot (no panic or trap). I've done a little bit of investigation and I see that the crash happens in radeonfb_create() when the following code is executed: memset(rbo->kptr, 0x0, radeon_bo_size(rbo)); It seems like this could be the very first write to the video memory, but I am not sure. I suspect that the problem could be a hardware one. But maybe this could be a software or configuration problem? I've collected kernel messages from the driver: https://people.freebsd.org/~avg/radeon6850.txt (Please note that I've moved the memset line after the code that reports fb properties to see if they are sane) -- Andriy Gapon
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