Re: 2.6.16-rc3 + Xorg 6.9.0 - works for me...

Re: 2.6.16-rc3 + Xorg 6.9.0 - works for me...

[Woody Suwalski]

 >>>
I just upgraded my Netwinder from 2.4.27 to 2.6.15 and the framebuffer
no longer works.  Console works but when I start X.org I first get a
corrupted screen and a little bit later the whole machine hangs.
There's no panic or any information on the serial console.
<<<

This problem appears only on Cyber2010 chips (Netwinders with Cyber2000 
work OK)

The crash issue on 2010 can be solved by disabling burst mode on the 
Cyberpro 2010 (graphic register 0x30, EXT_BUS_CTL_PCIBURST_WRITE=0). It 
is enabled in the kernel driver by default now.

However, I can see in the cyber2000fb.c file that the 2010 is also used 
on Shark architecture.

Martin, Russell,
Can you verify if the current 2.6.1x kernel + X 6.9 works OK on SHARK 
machine??? I do not have any of them here to test...

Basically we need to establish, if this fix is needed just for 
Netwinders with CyberPro 2010 (here tested on machine with 1M VRAM in 
32-bit mode, but Martin seems to have problem on 2M VRAM Netwinder?) or 
all machines with CyberPro 2010.

Thanks, Woody

-- 
Xandros Corporation
Simple. Powerful. Linux.
Visit us at http://www.xandros.com

Re: 2.6.16-rc3 + Xorg 6.9.0 - works for me...

[Russell King]

On Wed, Apr 26, 2006 at 02:38:34PM -0400, Woody Suwalski wrote:
> >>>
> I just upgraded my Netwinder from 2.4.27 to 2.6.15 and the framebuffer
> no longer works.  Console works but when I start X.org I first get a
> corrupted screen and a little bit later the whole machine hangs.
> There's no panic or any information on the serial console.
> <<<
> 
> This problem appears only on Cyber2010 chips (Netwinders with Cyber2000 
> work OK)
> 
> The crash issue on 2010 can be solved by disabling burst mode on the 
> Cyberpro 2010 (graphic register 0x30, EXT_BUS_CTL_PCIBURST_WRITE=0). It 
> is enabled in the kernel driver by default now.

Exactly the same code exists in the 2.4.21-rmk kernel (just diff'd the
two drivers), so I don't understand why hasn't the problem been reported
against 2.4 kernels.

> Martin, Russell,
> Can you verify if the current 2.6.1x kernel + X 6.9 works OK on SHARK 
> machine??? I do not have any of them here to test...

I don't have Shark hardware either.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core


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Re: 2.6.16-rc3 + Xorg 6.9.0 - works for me...

[Woody Suwalski]

Russell King wrote:
> On Wed, Apr 26, 2006 at 02:38:34PM -0400, Woody Suwalski wrote:
>> I just upgraded my Netwinder from 2.4.27 to 2.6.15 and the framebuffer
>> no longer works.  Console works but when I start X.org I first get a
>> corrupted screen and a little bit later the whole machine hangs.
>> There's no panic or any information on the serial console.
>> <<<
>>
>> This problem appears only on Cyber2010 chips (Netwinders with Cyber2000 
>> work OK)
>>
>> The crash issue on 2010 can be solved by disabling burst mode on the 
>> Cyberpro 2010 (graphic register 0x30, EXT_BUS_CTL_PCIBURST_WRITE=0). It 
>> is enabled in the kernel driver by default now.
> 
> Exactly the same code exists in the 2.4.21-rmk kernel (just diff'd the
> two drivers), so I don't understand why hasn't the problem been reported
> against 2.4 kernels.

Yes, but the problem may be caused by faster/slower/smarter... driving 
of PCI bus e.t.c... It just happens to trigger now the right noise level...

> 
>> Martin, Russell,
>> Can you verify if the current 2.6.1x kernel + X 6.9 works OK on SHARK 
>> machine??? I do not have any of them here to test...
> 
> I don't have Shark hardware either.
> 
Well, maybe Martin or Wookey can find one...

Woody

-- 
Xandros Corporation
Simple. Powerful. Linux.
Visit us at http://www.xandros.com


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Re: 2.6.16-rc3 + Xorg 6.9.0 - works for me...

[Martin Michlmayr]

* Woody Suwalski <woodys@xandros.com> [2006-04-26 16:15]:
> >>Can you verify if the current 2.6.1x kernel + X 6.9 works OK on SHARK 
> >>machine??? I do not have any of them here to test...
> >
> >I don't have Shark hardware either.
> >
> Well, maybe Martin or Wookey can find one...

I have no Shark, but I can confirm that 2.4 works on my Netwinder
while 2.6 doesn't.
-- 
Martin Michlmayr
http://www.cyrius.com/

Re: 2.6.16-rc3 + Xorg 6.9.0 - works for me...

[Russell King]

On Thu, Apr 27, 2006 at 01:48:17PM +0200, Martin Michlmayr wrote:
> * Woody Suwalski <woodys@xandros.com> [2006-04-26 16:15]:
> > >>Can you verify if the current 2.6.1x kernel + X 6.9 works OK on SHARK 
> > >>machine??? I do not have any of them here to test...
> > >
> > >I don't have Shark hardware either.
> > >
> > Well, maybe Martin or Wookey can find one...
> 
> I have no Shark, but I can confirm that 2.4 works on my Netwinder
> while 2.6 doesn't.

And under 2.6, does clearing this burst bit solve your problem?

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core


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Re: 2.6.16-rc3 + Xorg 6.9.0 - works for me...

[Martin Michlmayr]

* Russell King <rmk@arm.linux.org.uk> [2006-04-27 12:53]:
> > I have no Shark, but I can confirm that 2.4 works on my Netwinder
> > while 2.6 doesn't.
> 
> And under 2.6, does clearing this burst bit solve your problem?

I don't have access to my machine at the moment, but Ralph reproduced
it on his.
-- 
Martin Michlmayr
http://www.cyrius.com/

Re: 2.6.16-rc3 + Xorg 6.9.0 - works for me...

[Ralph Siemsen]

Russell King wrote:

> And under 2.6, does clearing this burst bit solve your problem?

Yes, I have confirmed this behaviour.  Clearing the burst flag makes the 
2010 work for me.  I tried all other sorts of changes, like going back 
to the "OLD_PLL" code and similar, but none had any effect, except for 
the burst flag.

RMK, its worth noting that "2.4" in the previous conversation was 
referring to 2.4.19-rmk7, so that may explain why it was working there.

So is it a 2010 bug?  Seems unlikely...

-R

PS. I am still seeing X crash after a few hours running x11perf, now 
with both 2.4 and 2.6 framebuffers.  Its easily reproduced, but without 
any debugging symbols in the X binary, I'm not sure how useful a gdb 
backtrace would be...

Re: 2.6.16-rc3 + Xorg 6.9.0 - works for me...

[Woody Suwalski]

Ralph Siemsen wrote:
> Russell King wrote:
>
>> And under 2.6, does clearing this burst bit solve your problem?
>
> Yes, I have confirmed this behaviour.  Clearing the burst flag makes 
> the 2010 work for me.  I tried all other sorts of changes, like going 
> back to the "OLD_PLL" code and similar, but none had any effect, 
> except for the burst flag.
>
> RMK, its worth noting that "2.4" in the previous conversation was 
> referring to 2.4.19-rmk7, so that may explain why it was working there.
>
> So is it a 2010 bug?  Seems unlikely...
>
> -R
>
> PS. I am still seeing X crash after a few hours running x11perf, now 
> with both 2.4 and 2.6 framebuffers.  Its easily reproduced, but 
> without any debugging symbols in the X binary, I'm not sure how useful 
> a gdb backtrace would be...
>
My Netwinder gateway (Cyber 2000) running 2.6.11 and old Debian 
4.3.0.dfsg.1-14sarge1 XFree is uptime'd for months...
With CPU usage sometimes very heavy....

Did not try the same on new X7.0.

OTOH, x11perf may be more demanding then plain usage...

Woody