From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932690AbbJ0Qwr (ORCPT ); Tue, 27 Oct 2015 12:52:47 -0400 Received: from host18.canaca.com ([66.49.204.205]:46084 "EHLO host18.canaca.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754398AbbJ0Qwo (ORCPT ); Tue, 27 Oct 2015 12:52:44 -0400 Message-ID: In-Reply-To: <668ab5528ec8345f98e09e2efb074105.squirrel@mungewell.org> References: <668ab5528ec8345f98e09e2efb074105.squirrel@mungewell.org> Date: Tue, 27 Oct 2015 10:52:44 -0600 Subject: Re: [Regression/Oops] nsc-ircc: 4.3.0rc6/rc7 No backlight on Thinkpad T60P From: "Simon Wood" To: =?iso-8859-1?Q?=22Ville_Syrj=E4l=E4=22?= Cc: linux-kernel@vger.kernel.org, "Samuel Ortiz" , netdev@vger.kernel.org, simon@mungewell.org User-Agent: SquirrelMail/1.5.2 [SVN] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - host18.canaca.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - mungewell.org X-Get-Message-Sender-Via: host18.canaca.com: authenticated_id: simon@mungewell.org X-Authenticated-Sender: host18.canaca.com: simon@mungewell.org X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Looks like Ville has tracked down a possible problem. Will patch/rebuild and confirm whether it solves my problem. https://lkml.org/lkml/2015/10/25/284 Simon. On Tue, October 27, 2015 9:07 am, Simon Wood wrote: > Tried the latest kernel and have the issue where the LCD backlight does > not light (ie dark screen) after the kernel has booted. > > It appears that there is a 'oops' with the nsc-ircc driver, and I assume > that this is the root of the problem. 4.3.0rc6 and rc7 are bad, rc2 seems > OK. > > > -- > Oct 23 07:35:08 retrobox kernel: [ 23.640044] nsc-ircc, driver loaded > (Dag Brattli) > Oct 23 07:35:08 retrobox kernel: [ 23.640730] BUG: unable to handle > kernel NULL pointer dereference at 00000130 Oct 23 07:35:08 retrobox > kernel: [ 23.641422] IP: [] > arch_dma_alloc_attrs+0x12/0x70 Oct 23 07:35:08 retrobox kernel: [ > 23.641953] *pdpt = 00000000363cb001 > *pde = 0000000000000000 > Oct 23 07:35:08 retrobox kernel: [ 23.642517] Oops: 0000 [#1] SMP > Oct 23 07:35:08 retrobox kernel: [ 23.642849] Modules linked in: > nsc_ircc(+) snd_seq_device snd_timer snd floppy(+) irda soundcore crc_ccitt > shpchp 8250_fintek video mac_hid parport_pc ppdev lp parport autofs4 > e1000e psmouse ptp pata_acpi pps_core Oct 23 07:35:08 retrobox kernel: [ > 23.644011] CPU: 0 PID: 267 Comm: > systemd-udevd Not tainted 4.3.0-rc6-g920+ #10 Oct 23 07:35:08 retrobox > kernel: [ 23.644011] Hardware name: LENOVO > 2008VPX/2008VPX, BIOS 79ETE5WW (2.25 ) 08/27/2009 > Oct 23 07:35:08 retrobox kernel: [ 23.644011] task: f37c71c0 ti: > f63cc000 task.ti: f63cc000 Oct 23 07:35:08 retrobox kernel: [ 23.644011] > EIP: 0060:[] > EFLAGS: 00010202 CPU: 0 > Oct 23 07:35:08 retrobox kernel: [ 23.644011] EIP is at > arch_dma_alloc_attrs+0x12/0x70 Oct 23 07:35:08 retrobox kernel: [ > 23.644011] EAX: f63cdd08 EBX: > 00000000 ECX: 000080d0 EDX: f63cdd0c > Oct 23 07:35:08 retrobox kernel: [ 23.644011] ESI: f6afe66c EDI: > c1a305c0 EBP: f63cdd00 ESP: f63cdcfc Oct 23 07:35:08 retrobox kernel: [ > 23.644011] DS: 007b ES: 007b FS: > 00d8 GS: 00e0 SS: 0068 > Oct 23 07:35:08 retrobox kernel: [ 23.644011] CR0: 80050033 CR2: > 00000130 CR3: 36945200 CR4: 000006f0 > Oct 23 07:35:08 retrobox kernel: [ 23.644011] Stack: > Oct 23 07:35:08 retrobox kernel: [ 23.644011] 00003830 f63cdd20 > f8532a11 00000000 000080d0 f63cdd68 f6afe000 f6afe500 Oct 23 07:35:08 > retrobox kernel: [ 23.644011] f6afe598 f63cdd68 f85371c9 c19ce2e2 > f85340bc 00000000 f63cddc8 f63cdd58 Oct 23 07:35:08 retrobox kernel: [ > 23.644011] c10b9be1 00000000 > 00000006 00000000 00000000 f8533267 f63cdd6c f63cdd60 > Oct 23 07:35:08 retrobox kernel: [ 23.644011] Call Trace: > Oct 23 07:35:08 retrobox kernel: [ 23.644011] [] > dma_alloc_attrs.constprop.18+0x4b/0x71 [nsc_ircc] Oct 23 07:35:08 retrobox > kernel: [ 23.644011] [] > nsc_ircc_open+0x1c9/0x42c [nsc_ircc] Oct 23 07:35:08 retrobox kernel: [ > 23.644011] [] ? > vprintk_default+0x41/0x60 Oct 23 07:35:08 retrobox kernel: [ 23.644011] > [] > nsc_ircc_init+0x1b8/0xbd4 [nsc_ircc] Oct 23 07:35:08 retrobox kernel: [ > 23.644011] [] > do_one_initcall+0xc6/0x200 Oct 23 07:35:08 retrobox kernel: [ 23.644011] > [] ? > nsc_ircc_open+0x42c/0x42c [nsc_ircc] Oct 23 07:35:08 retrobox kernel: [ > 23.644011] [] ? > nsc_ircc_open+0x42c/0x42c [nsc_ircc] Oct 23 07:35:08 retrobox kernel: [ > 23.644011] [] ? > do_one_initcall+0xc6/0x200 Oct 23 07:35:08 retrobox kernel: [ 23.644011] > [] ? > nsc_ircc_open+0x42c/0x42c [nsc_ircc] Oct 23 07:35:08 retrobox kernel: [ > 23.644011] [] ? > preempt_schedule_common+0x1b/0x40 Oct 23 07:35:08 retrobox kernel: [ > 23.644011] [] ? > _cond_resched+0x25/0x30 > -- > > > Cheers, > Simon.