From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262580AbUCEMvq (ORCPT ); Fri, 5 Mar 2004 07:51:46 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262583AbUCEMvq (ORCPT ); Fri, 5 Mar 2004 07:51:46 -0500 Received: from uh02.cern.ch ([137.138.53.31]:1152 "EHLO uh02.cern.ch") by vger.kernel.org with ESMTP id S262580AbUCEMvl (ORCPT ); Fri, 5 Mar 2004 07:51:41 -0500 To: linux-kernel@vger.kernel.org Message-Id: From: Anton Empl Date: Fri, 05 Mar 2004 13:51:40 +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, this is not to complain but rather to report and try to sort out problems experienced with the 2.6.x kernel for quite a long time. I am not a kernel expert so please forgive any not helpful statements here. Also, the hardware used is a Thinkpad T30 (2366-96U) laptop and all might just be specific to that system. APM/ACPI ----------- There is no problem when using APM and suspending to ram - the system will turn off the LCD display at the end just fine. But when using ACPI (the BIOS is updated and other ACPI features work just fine) the system will suspend and NOT turn the LCD back-light off. This is true for both running X11 or not. CPU speed ----------- Another detail is that unless one responds to the boot manager (here grub) quickly with a RETURN to start the boot process the system will come up at about half the actual CPU speed (1.2GHz instead of 2GHz) independent of selecting CPUfreq stuff. Absolutely repeatable. The system is still recognized as: CPU: Intel Mobile Intel(R) Pentium(R) 4 - M CPU 2.00GHz stepping 07 USB hub ----------- Since this system only has USB1 available internally I purchased a PCMCIA USB2 hub (ATEN USB 2.0 2 Port Host Control Card: PU-212). Inserting this card into a running kernel about every other time locks up the system. The lockup is more likely if the card is inserted later. Here's a transcript (by hand) of the oops: *pde= 00000000 Oops: 0002 [#1] CPU: 0 EIP: 0060: [] Not tainted EFLAGS: 00010296 EIP is at end_unlink_async+0x1a/0xf6 [ehci_hcd] Process usb.agent Call trace: ehci_work ehci_irq usb_hcd_irq handle_IRQ_event do_IRQ common_interrupt kernel panic: fatal exception in interrupt In interrupt handler - not syncing I can certainly provide more information but the problems described above are rather independent of the actual details of building the kernel and rather stable. thanks, Anton.Empl@cern.ch