linux-kernel - Re: Possible 3.13-rc nouveau regression with GT 560 Ti

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Date:	Thu, 02 Jan 2014 02:36:09 +0000
From:	Sid Boyce <sboyce@...eyonder.co.uk>
To:	Ilia Mirkin <imirkin@...m.mit.edu>
CC:	LKML Mailing List <linux-kernel@...r.kernel.org>,
	opensuse factory list <opensuse-factory@...nsuse.org>,
	"nouveau@...ts.freedesktop.org" <nouveau@...ts.freedesktop.org>
Subject: Re: Possible 3.13-rc nouveau regression with GT 560 Ti

On 01/01/14 18:46, Ilia Mirkin wrote:
> On Wed, Jan 1, 2014 at 9:04 AM, Sid Boyce <sboyce@...eyonder.co.uk> wrote:
>> On 01/01/14 00:55, Ilia Mirkin wrote:
>>> On Tue, Dec 31, 2013 at 7:41 PM, Sid Boyce <sboyce@...eyonder.co.uk>
>>> wrote:
>>>> On 31/12/13 10:36, Ilia Mirkin wrote:
>>>>> Having a dmesg would be nice. One thing I can think of off-hand is
>>>>> that 3.13-rc has MSI turned on by default. You can turn it off by
>>>>> adding "nouveau.config=NvMSI=0" to your kernel cmdline. If that
>>>>> doesn't help, a bisect restricted to drivers/gpu/drm/nouveau should
>>>>> show the offending commit fairly quickly.
>>>>>
>>>>>      -ilia
>>>>>
>>>> Adding "nouveau.config=NvMSI=0" to the command line fixed the problem.
>>>> So it looks like commit 049ffa8ab33a63b3bff672d1a0ee6a35ad253fe8
>>>> introduced
>>>> it.
>>> Any chance you might mmiotrace the blob (version 325 or later) to see
>>> which registers it fiddles with? Or alternatively, if you have a NVCE
>>> card (you never did end up providing the logs which would have made
>>> that apparent), could you try replacing nvc3_mc_oclass with
>>> nvc0_mc_oclass for the 0xce case in
>>> drivers/gpu/drm/nouveau/core/engine/device/nvc0.c? (and boot without
>>> the MSI disabling.) The switch has already been made for NVC8 in
>>> 0bae1d61c75 -- perhaps there are more "odd" ones.
>>>
>>>     -ilia
>>>
>> Fails exactly the same.
>>          case 0xc3:
>>                  device->cname = "GF106";
>>
>>                  device->oclass[NVDEV_SUBDEV_VBIOS  ] = &nouveau_bios_oclass;
>>                  device->oclass[NVDEV_SUBDEV_GPIO   ] = &nv50_gpio_oclass;
>>                  device->oclass[NVDEV_SUBDEV_I2C    ] = &nv94_i2c_oclass;
>>                  device->oclass[NVDEV_SUBDEV_CLOCK  ] = &nvc0_clock_oclass;
>>                  device->oclass[NVDEV_SUBDEV_THERM  ] = &nva3_therm_oclass;
>>                  device->oclass[NVDEV_SUBDEV_MXM    ] = &nv50_mxm_oclass;
>>                  device->oclass[NVDEV_SUBDEV_DEVINIT] = &nvc0_devinit_oclass;
>>                  device->oclass[NVDEV_SUBDEV_MC     ] = nvc0_mc_oclass;
>> <<<<<====
>>                  device->oclass[NVDEV_SUBDEV_BUS    ] = nvc0_bus_oclass;
>>                  device->oclass[NVDEV_SUBDEV_TIMER  ] = &nv04_timer_oclass;
> That's the 0xc3 case... you have a nvce card, not nvc3 -- you would
> need to change the NVDEV_SUBDEV_MC line to nvc0_mc_oclass for the 0xce
> case.
>
>> The dmesg and Xorg.0.log with the problem captured across a ssh link.
>>
>> # ps fax|grep X
>>   5633 pts/0    S+     0:00          \_ grep --color=auto X
>>   5160 tty7     Ss+    0:08  \_ /usr/bin/Xorg -br :0 vt7 -nolisten tcp -auth
>> /var/lib/kdm/AuthFiles/A:0-yqspza
>>
>> Also
>> # echo mmiotrace > /sys/kernel/debug/tracing/current_tracer
>> -bash: echo: write error: Invalid argument.
> Take a look at https://wiki.ubuntu.com/X/MMIOTracing
>
>    -ilia
>
Of course it's a GF114.
Made the change and it boots without the command line change.
Regards
Sid.

-- 
Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
Senior Staff Specialist, Cricket Coach
Microsoft Windows Free Zone - Linux used for all Computing Tasks

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