[opensuse] Re: [suse-sles-e] SLES10 with hanging serial console

Date: Mon, 27 Nov 2006 16:02:36 +0100 (CET) From: Norbert Paschedag Subject: [suse-sles-e] SLES10 with hanging serial console Message-ID:

Hi,

we're using serial consoles on most servers for maintenance etc. This is usually no problem. Recently, however, we got our first SLES10 servers and almost immediately noticed annoying "hangs" during the boot or autoinstall phase, where the server simply stops and continues only after a keypress. This is particularly annoying since autoinstallation is about *not* having to press keys.

The problem persists for all possible combinations of flow control and baud rates (9600 and 19200 were tested).

This problem was not seen with SLES9 on the same hardware (and with the same serial cabling).

Our configuration: Tyan S3992G3NR mobo with 3291 BMC SLES10 with recent patches installed (2.6.16.21-0.25-smp kernel) BIOS (and only the BIOS) output redirected to COM1, 19200,8,n,1 with hw flow control Kernel cmdline: .... console=tty0 console=ttyS0,19200n8

Has anyone else seen this behaviour and found a remedy ?

I apparently missed this when it was first posted to the list, and found it via google, but don't see any followups. We're seeing the same problem. Installs will hang on the serial console, pressing a key will allow it to continue on for awhile. We're different in that it's SLES9-SP3 but using a kernel built from the SLES10 src.rpm, and we're using no flow control. I found a patch for RHEL4 kernel 2.6.9-42 that talks about fixing a hanging serial console (from Alan Cox) but the changes to the file are so great (even complete changes in struct types) that I can't get that patched. Looking at a newer RH kernel to see if the patch was updated as time went on. If anyone has a solution already though, it would be nice. -- Mike Marion-Unix SysAdmin/Staff IT Engineer-http://www.qualcomm.com "Bill Gates is a white Persian cat and a monocle away from becoming another James Bond villain." "No Mr Bond, I expect you to upgrade." --Dennis Miller -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org