Re: [Soekris] net6501: Timer problems with Debian, no HPET support detected

[Chris Cappuccio]

Darryl Miles [darryl-mailingli...@netbauds.net] wrote:
> Peter Neubauer wrote:
> > Linux depends on an ACPI BIOS to provide configuration for the HPET. The
> > net6501 does not support ACPI, so Linux does not use the HPET.
> 
> Great news on the patch.
> 
> 
> What is the reason for not having ACPI ?
> 

There is no use for it on the net6501. The BIOS implementation is a lot of work.
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Re: [Soekris] net6501: Timer problems with Debian, no HPET support detected

[Darryl Miles]

Peter Neubauer wrote:
> Linux depends on an ACPI BIOS to provide configuration for the HPET. The
> net6501 does not support ACPI, so Linux does not use the HPET.

Great news on the patch.


What is the reason for not having ACPI ?



Darryl
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Re: [Soekris] net6501: Timer problems with Debian, no HPET support detected

[Peter Neubauer]

Linux depends on an ACPI BIOS to provide configuration for the HPET.  
The net6501 does not support ACPI, so Linux does not use the HPET.


However, I've created a patch (attached) for Linux 3.2 that enables HPET 
on the net6501.  I've been running with this patch for several months 
and have no problems.


-Peter

On 3/10/2012 3:30 AM, George wrote:
I tried Debian/Ubuntu with different kernels 2.6.32 and 2.6.38 on 
net6501-70 BIOS 1.41a. All do not detect the HPET.


Kernel timer interrupt frequency is approx. 1000 Hz instead of 4000 Hz 
or higher with LowLatency kernel. Same kernels on other motherboards 
work fine.


cat /proc/timer_list does not list hpet and shows
.resolution: 999848 nsecs instead of 1 nsecs


--- linux-3.2-rc4/arch/x86/kernel/quirks.c  2011-12-01 14:56:01.0 
-0800
+++ patched_quirks.c2011-12-30 10:00:43.0 -0800
@@ -508,6 +508,20 @@
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS,
 force_disable_hpet_msi);
 
+
+static void e6xx_force_enable_hpet(struct pci_dev *dev)
+{
+   if (hpet_address || force_hpet_address)
+   return;
+
+   force_hpet_address = 0xfed0;
+   force_hpet_resume_type = NONE_FORCE_HPET_RESUME;
+   dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
+   "0x%lx\n", force_hpet_address);
+}
+
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x8183, e6xx_force_enable_hpet);
+
 #endif
 
 #if defined(CONFIG_PCI) && defined(CONFIG_NUMA)
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Re: [Soekris] net6501: Timer problems with Debian, no HPET support detected

[Stuart Henderson]

On 2012-03-10, Frank Schuhmann  wrote:
> Is the bios from the Soekris net6501 ACPI conform?

No

This came up on the list before, see "Re: FreeBSD/amd64 on
Net6501 working!" from Dec 2011.

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Re: [Soekris] net6501: Timer problems with Debian, no HPET support detected

[George]

Thank you Chris.

 I found no newer firmware than 1.41a on soekris downloads and I need a 2.6 
kernel due to compatibility of own software (kernel driver).

Kind Regards

George


On 10.03.2012, at 15:34, Chris Boot  wrote:

> On 10 Mar 2012, at 11:30, George  wrote:
> 
>> Hi
>> 
>> I tried Debian/Ubuntu with different kernels 2.6.32 and 2.6.38 on net6501-70 
>> BIOS 1.41a. All do not detect the HPET.
>> 
>> Kernel timer interrupt frequency is approx. 1000 Hz instead of 4000 Hz or 
>> higher with LowLatency kernel. Same kernels on other motherboards work fine.
>> 
>> cat /proc/timer_list does not list hpet and shows
>> .resolution: 999848 nsecs instead of 1 nsecs
>> 
>> Any workaround?
> 
> Disclaimer: I don't have a net6501.
> 
> I think you really want a later kernel than the ones in Debian Squeeze. You 
> can either get a 3.2 kernel from backports.debian.org, or you could upgrade 
> to wheezy. There are many issues with earlier kernels that mean the very new 
> hardware in the 6501 isn't fully supported.
> 
> You should also grab the latest firmware for the 6501 from the Soekris web 
> site. There may be beta firmware that will work better for you, as well.
> 
> Chris
> 
> -- 
> Chris Boot
> bo...@bootc.net
> 
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Re: [Soekris] net6501: Timer problems with Debian, no HPET support detected

[Frank Schuhmann]

Hi George,

perhaps you will do a list search for the following:

Author: Wim Vandeputte
Subject: [Soekris] net6501 - Linux 2.6.32-5-686 (Debian 2.6.32-35squeeze2)
= 2 messages 

Author: Karl Auerbach 
Subject: [Soekris] Linux on Net6501
= 2 messages

Is the bios from the Soekris net6501 ACPI conform? (If not shame on me)

Did you first install on another machine (Hardware) the OS and put this 
medium (HDD/SSD) in the Soekris box?

 is written in German but
declares the HEPT problematic 
on some hardware at the example with Debian Linux very fine and shows some main
boards with and without support. 

Or have a quick look at 
(English)

Did this main board have special options for enable and disable the HPET
in the bios and at the Soekris hardware this options should now be changed?

Wim Vandeputte was using the Debian 6.0 kernel version - 2.6.32-5-686 for a
test.
Karl Auerbach: wrote

>" I've now got Linux 3.0.8 up and running (in 32-bit mode) on the Net6501."
>"I had to apply the patch below to fix the kernel panic problem."

At some main boards HPET must be disabled by setting the kernel parameter
hpet=disabled, 
it is not enough to discard this option during the kernel configuration, because
the RTC driver 
does emulating a HPET device.

I hope this was helping you out.

-- 
Kind regards 

Frank


> -Original Message-
> From: soekris-tech-boun...@lists.soekris.com [mailto:soekris-tech-
> boun...@lists.soekris.com] On Behalf Of George
> Sent: Saturday, March 10, 2012 12:31 PM
> To: soekris-tech@lists.soekris.com
> Subject: [Soekris] net6501: Timer problems with Debian, no HPET support
detected
> 
> Hi
> 
> I tried Debian/Ubuntu with different kernels 2.6.32 and 2.6.38 on net6501-70
BIOS 1.41a.
> All do not detect the HPET.
> 
> Kernel
>  timer interrupt frequency is approx. 1000 Hz instead of 4000 Hz or higher
with
> LowLatency kernel. Same kernels on other motherboards work fine.
> 
> cat /proc/timer_list does not list hpet and shows
> .resolution: 999848 nsecs instead of 1 nsecs
> 
> Any workaround?
> 
> Regards George

 

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Re: [Soekris] net6501: Timer problems with Debian, no HPET support detected

[Chris Boot]

On 10 Mar 2012, at 11:30, George  wrote:

> Hi
> 
> I tried Debian/Ubuntu with different kernels 2.6.32 and 2.6.38 on net6501-70 
> BIOS 1.41a. All do not detect the HPET.
> 
> Kernel timer interrupt frequency is approx. 1000 Hz instead of 4000 Hz or 
> higher with LowLatency kernel. Same kernels on other motherboards work fine.
> 
> cat /proc/timer_list does not list hpet and shows
> .resolution: 999848 nsecs instead of 1 nsecs
> 
> Any workaround?

Disclaimer: I don't have a net6501.

I think you really want a later kernel than the ones in Debian Squeeze. You can 
either get a 3.2 kernel from backports.debian.org, or you could upgrade to 
wheezy. There are many issues with earlier kernels that mean the very new 
hardware in the 6501 isn't fully supported.

You should also grab the latest firmware for the 6501 from the Soekris web 
site. There may be beta firmware that will work better for you, as well.

Chris

-- 
Chris Boot
bo...@bootc.net

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