From mboxrd@z Thu Jan 1 00:00:00 1970 From: John David Anglin Subject: Re: PCI video card hangs during system boot Date: Thu, 14 Apr 2016 12:19:28 -0400 Message-ID: <570FC310.2050000@bell.net> References: <1587186.CtnrnCsSzp@caliban.sf-tec.de> <570D38BF.7040307@bell.net> <570E5F69.4010203@bell.net> <4E86DE96-4108-41F1-872C-F7E04075466A@bell.net> <570FB039.8040109@bell.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Cc: Graham Gower , Rolf Eike Beer , linux-parisc , Helge Deller To: Simone Mannori Return-path: In-Reply-To: List-ID: List-Id: linux-parisc.vger.kernel.org On 2016-04-14 11:54 AM, Simone Mannori wrote: > Very interesting and useful info, but they don't help us to fix the basic issue. > > We have several AGP cards able to work correctly BUT in passive frame > buffer only mode, therefore the c8000, a quite fast quad core > workstation , with X11, looks like a bradypus instead that a > velociraptor. > > This is the moment to recompile a custom kernel with some printk. > I tried this a year or so ago. I pretty much convinced myself that the firmware loaded correctly, and that read and write operations seemed to work. However, I wasn't able to find why the the ring buffer test failed. I also checked that the firmware was identical to that used on hpux. There is an ATI document somewhere on the register interface. I understand your frustration. Dave -- John David Anglin dave.anglin@bell.net