Hi Frank Danke/Thanks.
I found no option in Soekris BIOS to activate HPET. I installed always fresh OS (Ubuntu) with PXE netboot. I need 2.6.3x kernel because of own real-time kernel driver. I need high resolution timer with 4000 Hz. High resolution timer seams not work on Soekris net6501 because of missing HPET. On net6501 I only get pit and lapic but no hpet with cat /proc/timer_list. Reagrds George 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? <http://www.vdr-wiki.de/wiki/index.php/ACPI_Wakeup> 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 <https://bugzilla.kernel.org/show_bug.cgi?id=12013> (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-bounces at lists.soekris.com [mailto:soekris-tech- >bounces at lists.soekris.com] On Behalf Of George >Sent: Saturday, March 10, 2012 12:31 PM >To: soekris-tech at 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 _______________________________________________ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
