From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,LOTS_OF_MONEY,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 81E10CA9EAE for ; Wed, 23 Oct 2019 06:03:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 180DB21872 for ; Wed, 23 Oct 2019 06:03:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="eeNagu19" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725874AbfJWGDV (ORCPT ); Wed, 23 Oct 2019 02:03:21 -0400 Received: from mail-yb1-f172.google.com ([209.85.219.172]:37291 "EHLO mail-yb1-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725852AbfJWGDV (ORCPT ); Wed, 23 Oct 2019 02:03:21 -0400 Received: by mail-yb1-f172.google.com with SMTP id z125so5962716ybc.4 for ; Tue, 22 Oct 2019 23:03:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=RPk7mT7bGh07f3cKgLebQ2ehwiTs5qu6zUyQrJuc95Q=; b=eeNagu19JkirSj3flEq5V+Ir7vOs6ILr4kdBLu4mYCZDR6UPHDFb8OTvheFs5RGlhc d8fwso0N80y3+qGWmODcCyhM6E5rVRnOxZ2/f1HtPrqBtrL7oXpdujKMigVSzIfG7crK LfzGnIpw22+HQSF6LpKa2fMNe0a9FPu25acTEIyUm3fMHuYkE/5OosaKIzScOYStc9k9 Trm4Z6CGRkUiaeaJ+zmU49gjuoiaDIaW4Epv23ABdFv/VnsX3ylkwdZmR/FLMvxKKwRA JoaoqC0bVa+/K+SWrczRU2PSdHFOrUZ31gNFDmmL+lHmJyJ4lpzrdhcGUvXZqx5L3XKc HKGQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=RPk7mT7bGh07f3cKgLebQ2ehwiTs5qu6zUyQrJuc95Q=; b=A76RZ1AnKWUABEbXUBSSy7d8gDj/4Di/t6iayOrYXvytgZdOaXRnCnL5rUD1xGg8x8 o4iiuRsK2mX2K6ChhFhwCECwcQ769PUQ3Cr7zR5ZhOCa6lBdDgQlnSEN8mIDWOH8sj8+ c39v4C+kVdihtbkoAByqTpZQ9V2wSOF9AjuuXiRffZIOnEuTLfO77a+oT6bHr70LHk5M XeyMCoMcPZtVKYXpeXUcyvE8G59+0M+Mi4XjZVI3MP44XvGfFm34Fe0dNg7urVinMNGP y27WiZDUq423REertDSBm+79kNs2Z26T3oS5/yv8bJLVEk5gnSvsu6JPNa6cClW5k0Ce N8Ng== X-Gm-Message-State: APjAAAWCogk65BZKnGm/yIktLuGDb5Ousl/uexqj/bFdr2hZFNdgqK2U yk/0F0TGX/WsQ7J1qar4xwCXYbEgMuRS9LZnH6tFuaKD X-Google-Smtp-Source: APXvYqx6E2HLb1/PTroL13UdnF4az8HrE1uNy3TwHniNOD4GxeflrMpkDBaGSinNZlWQu+SxkyQhiBpsrhgYfo7QuVU= X-Received: by 2002:a5b:702:: with SMTP id g2mr5099794ybq.49.1571810598470; Tue, 22 Oct 2019 23:03:18 -0700 (PDT) MIME-Version: 1.0 References: <1569073828-13019-1-git-send-email-chenhc@lemote.com> <20191022192547.480095-1-rikard.falkeborn@gmail.com> In-Reply-To: <20191022192547.480095-1-rikard.falkeborn@gmail.com> From: Carlo Pisani Date: Wed, 23 Oct 2019 08:03:13 +0200 Message-ID: Subject: rb532, Kernel panic - not syncing: Fatal exception in interrupt To: linux-mips@linux-mips.org, linux-mips@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org hi we have a rb532A router, running kernel 4.4.197. The miniPCI quad uart modules are installed During the test 1) /dev/ttyS5 was attached to Minicom, with a lot of traffic at 115200bps 2) a tftpboot server continuously received requests from clients and, we got this uc-rb532 ~ # CPU 0 Unable to handle kernel paging request at virtual address 425c2100, epc == 8041ecd8, ra == 8041ece0 Oops[#1]: CPU: 0 PID: 1398 Comm: minicom Not tainted 4.4.197-BlurryFishButt-rb532 #2 task: 835bda38 ti: 83768000 task.ti: 83768000 $ 0 : 00000000 1810e800 00000000 00000000 $ 4 : 425c2100 83cbd4f0 837aa9b4 0000b2cd $ 8 : 00000000 00000000 00000000 00000000 $12 : 0000b2cd 00000000 00175c88 00000000 $16 : 83cbd4f0 83cbd4f0 837aafa0 83cbd4f0 $20 : 00040000 836cf020 836cf020 80696cf0 $24 : 00000000 00000000 $28 : 83768000 83c079b0 00000000 8041ece0 Hi : 00000000 Lo : 0000001e epc : 8041ecd8 0x8041ecd8 ra : 8041ece0 0x8041ece0 Status: 1810e803 KERNEL EXL IE Cause : 80800008 (ExcCode 02) BadVA : 425c2100 PrId : 0001800a (MIPS 4Kc) Modules linked in: Process minicom (pid: 1398, threadinfo=83768000, task=835bda38, tls=77726470) Stack : 836cf020 836cf020 80696cf0 80180184 83cbd4f0 8041eb9c 00000000 00000000 83cbd4f0 8041ec00 837c88c4 83cbd4f0 83cbd4f0 837aa9b4 837aa9a0 8041ec3c 0000045a 00000000 00000002 00003833 836cf020 804a93b8 0082e818 00000000 806a0000 80648718 00000000 00000001 00000001 00000000 836cf020 83cbd4f0 837aa9b4 837aa9a0 00040000 836cf020 836cf020 80696cf0 00000000 804aca3c ... Call Trace:[<80180184>] 0x80180184 [<8041eb9c>] 0x8041eb9c [<8041ec00>] 0x8041ec00 [<8041ec3c>] 0x8041ec3c [<804a93b8>] 0x804a93b8 [<804aca3c>] 0x804aca3c [<8014e4dc>] 0x8014e4dc [<804b70c0>] 0x804b70c0 [<804b8c1c>] 0x804b8c1c [<80461c08>] 0x80461c08 [<8049039c>] 0x8049039c [<80490ac8>] 0x80490ac8 [<804902a0>] 0x804902a0 [<80490e70>] 0x80490e70 [<80423bc8>] 0x80423bc8 [<804904dc>] 0x804904dc [<8042c4b0>] 0x8042c4b0 [<805030cc>] 0x805030cc [<80461c08>] 0x80461c08 [<804e4e3c>] 0x804e4e3c [<805030cc>] 0x805030cc [<8042e9a0>] 0x8042e9a0 [<80502dec>] 0x80502dec [<80502bd8>] 0x80502bd8 [<804e34ac>] 0x804e34ac [<805030cc>] 0x805030cc [<805096d0>] 0x805096d0 [<8013cd24>] 0x8013cd24 [<80502c38>] 0x80502c38 [<80509d7c>] 0x80509d7c [<8050b098>] 0x8050b098 [<801686f0>] 0x801686f0 [<80509554>] 0x80509554 [<80461c08>] 0x80461c08 [<80461cac>] 0x80461cac [<8050328c>] 0x8050328c [<80141b8c>] 0x80141b8c [<8013cd24>] 0x8013cd24 [<80502c38>] 0x80502c38 [<8042c2d8>] 0x8042c2d8 [<80421ff0>] 0x80421ff0 [<8042e9a0>] 0x8042e9a0 [<803a16cc>] 0x803a16cc [<80334638>] 0x80334638 [<8042bbb4>] 0x8042bbb4 [<8042edc0>] 0x8042edc0 [<80120670>] 0x80120670 [<8016a868>] 0x8016a868 [<80151728>] 0x80151728 [<80120b08>] 0x80120b08 [<80105b44>] 0x80105b44 Code: 27bdffe8 afbf0014 afb00010 <0c107b14> 8c900000 1600fffd 02002025 8fbf0014 8fb00010 ---[ end trace 4f05eb314ec51065 ]--- Kernel panic - not syncing: Fatal exception in interrupt Rebooting in 2 seconds.. the same problem happened with kernel 4.9.91.running Minicom-v2.3-r2 ---- uc-rb532 ~ # dmesg Kernel command line: console=ttyS0,9600 gpio=16383 mem=64M kmac=00:0C:42:0E:8F:01 board=500r5 boot=1 root=/dev/sda3 initd korina mac = 00:0C:42:0E:8F:01 PID hash table entries: 256 (order: -2, 1024 bytes) Dentry cache hash table entries: 8192 (order: 3, 32768 bytes) Inode-cache hash table entries: 4096 (order: 2, 16384 bytes) Memory: 57840K/65536K available (4762K kernel code, 175K rwdata, 816K rodata, 188K init, 111K bss, 7696K reserved, 0K cma) NR_IRQS:256 Initializing IRQ's: 168 out of 256 calculating r4koff... 000c34f8(799992) CPU frequency 400.00 MHz clocksource: MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 9556397797 ns sched_clock: 32 bits at 199MHz, resolution 5ns, wraps every 10737525757ns Calibrating delay loop... 397.82 BogoMIPS (lpj=795648) pid_max: default: 32768 minimum: 301 Mount-cache hash table entries: 1024 (order: 0, 4096 bytes) Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes) clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns futex hash table entries: 256 (order: -1, 3072 bytes) NET: Registered protocol family 16 PCI: Initializing PCI SCSI subsystem initialized libata version 3.00 loaded. PCI host bridge to bus 0000:00 pci_bus 0000:00: root bus resource [mem 0x50000000-0x5fffffff] pci_bus 0000:00: root bus resource [io 0x18800000-0x188fffff] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff] pci 0000:00:00.0: [111d:0000] type 00 class 0x000000 pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x07ffffff pref] pci 0000:00:00.0: [Firmware Bug]: reg 0x14: invalid BAR (can't size) pci 0000:00:00.0: [Firmware Bug]: reg 0x18: invalid BAR (can't size) pci 0000:00:02.0: [1106:3106] type 00 class 0x020000 pci 0000:00:02.0: reg 0x10: [io 0x0000-0x00ff] pci 0000:00:02.0: reg 0x14: [mem 0x00000000-0x000000ff] pci 0000:00:02.0: supports D1 D2 pci 0000:00:02.0: PME# supported from D1 D2 D3hot D3cold pci 0000:00:03.0: [1106:3106] type 00 class 0x020000 pci 0000:00:03.0: reg 0x10: [io 0x0000-0x00ff] pci 0000:00:03.0: reg 0x14: [mem 0x00000000-0x000000ff] pci 0000:00:03.0: supports D1 D2 pci 0000:00:03.0: PME# supported from D1 D2 D3hot D3cold pci 0000:00:04.0: [168c:0029] type 00 class 0x028000 pci 0000:00:04.0: reg 0x10: [mem 0x00000000-0x0000ffff] pci 0000:00:04.0: PME# supported from D0 D3hot pci 0000:00:05.0: [1415:9501] type 00 class 0x070006 pci 0000:00:05.0: reg 0x10: [io 0x0000-0x001f] pci 0000:00:05.0: reg 0x14: [mem 0x00000000-0x00000fff] pci 0000:00:05.0: reg 0x18: [io 0x0000-0x001f] pci 0000:00:05.0: reg 0x1c: [mem 0x00000000-0x00000fff] pci 0000:00:05.0: supports D2 pci 0000:00:05.0: PME# supported from D0 D2 D3hot pci 0000:00:05.1: [1415:9500] type 00 class 0x000000 pci 0000:00:05.1: reg 0x10: [io 0x0000-0x0007] pci 0000:00:05.1: reg 0x14: [io 0x0000-0x0007] pci 0000:00:05.1: reg 0x18: [io 0x0000-0x001f] pci 0000:00:05.1: reg 0x1c: [mem 0x00000000-0x00000fff] pci 0000:00:05.1: supports D2 pci 0000:00:05.1: PME# supported from D0 D2 D3hot pci 0000:00:0a.0: [1415:9501] type 00 class 0x070006 pci 0000:00:0a.0: reg 0x10: [io 0x0000-0x001f] pci 0000:00:0a.0: reg 0x14: [mem 0x00000000-0x00000fff] pci 0000:00:0a.0: reg 0x18: [io 0x0000-0x001f] pci 0000:00:0a.0: reg 0x1c: [mem 0x00000000-0x00000fff] pci 0000:00:0a.0: supports D2 pci 0000:00:0a.0: PME# supported from D0 D2 D3hot pci 0000:00:0a.1: [1415:9500] type 00 class 0x000000 pci 0000:00:0a.1: reg 0x10: [io 0x0000-0x0007] pci 0000:00:0a.1: reg 0x14: [io 0x0000-0x0007] pci 0000:00:0a.1: reg 0x18: [io 0x0000-0x001f] pci 0000:00:0a.1: reg 0x1c: [mem 0x00000000-0x00000fff] pci 0000:00:0a.1: supports D2 pci 0000:00:0a.1: PME# supported from D0 D2 D3hot pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00 pci 0000:00:04.0: BAR 0: assigned [mem 0x50000000-0x5000ffff] pci 0000:00:05.0: BAR 1: assigned [mem 0x50010000-0x50010fff] pci 0000:00:05.0: BAR 3: assigned [mem 0x50011000-0x50011fff] pci 0000:00:0a.0: BAR 1: assigned [mem 0x50012000-0x50012fff] pci 0000:00:0a.0: BAR 3: assigned [mem 0x50013000-0x50013fff] pci 0000:00:02.0: BAR 0: assigned [io 0x18800000-0x188000ff] pci 0000:00:02.0: BAR 1: assigned [mem 0x50014000-0x500140ff] pci 0000:00:03.0: BAR 0: assigned [io 0x18800400-0x188004ff] pci 0000:00:03.0: BAR 1: assigned [mem 0x50014100-0x500141ff] pci 0000:00:05.0: BAR 0: assigned [io 0x18800800-0x1880081f] pci 0000:00:05.0: BAR 2: assigned [io 0x18800820-0x1880083f] pci 0000:00:0a.0: BAR 0: assigned [io 0x18800840-0x1880085f] pci 0000:00:0a.0: BAR 2: assigned [io 0x18800860-0x1880087f] clocksource: Switched to clocksource MIPS NET: Registered protocol family 2 TCP established hash table entries: 1024 (order: 0, 4096 bytes) TCP bind hash table entries: 1024 (order: 0, 4096 bytes) TCP: Hash tables configured (established 1024 bind 1024) UDP hash table entries: 256 (order: 0, 4096 bytes) UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) NET: Registered protocol family 1 PCI: CLS 16 bytes, default 16 io scheduler noop registered io scheduler deadline registered (default) Serial: 8250/16550 driver, 9 ports, IRQ sharing disabled serial8250: ttyS0 at MMIO 0x0 (irq = 104, base_baud = 12499875) is a 16550A console [ttyS0] enabled console [ttyS0] disabled serial8250.0: ttyS0 at MMIO 0x0 (irq = 104, base_baud = 12499875) is a 16550A console [ttyS0] enabled PCI: Enabling device 0000:00:05.0 (0000 -> 0003) ttyS1: detected caps 00000700 should be 00000500 0000:00:05.0: ttyS1 at I/O 0x18800800 (irq = 143, base_baud = 115200) is a 16C950/954 ttyS2: detected caps 00000700 should be 00000500 0000:00:05.0: ttyS2 at I/O 0x18800808 (irq = 143, base_baud = 115200) is a 16C950/954 ttyS3: detected caps 00000700 should be 00000500 0000:00:05.0: ttyS3 at I/O 0x18800810 (irq = 143, base_baud = 115200) is a 16C950/954 ttyS4: detected caps 00000700 should be 00000500 0000:00:05.0: ttyS4 at I/O 0x18800818 (irq = 143, base_baud = 115200) is a 16C950/954 PCI: Enabling device 0000:00:0a.0 (0000 -> 0003) ttyS5: detected caps 00000700 should be 00000500 0000:00:0a.0: ttyS5 at I/O 0x18800840 (irq = 140, base_baud = 115200) is a 16C950/954 ttyS6: detected caps 00000700 should be 00000500 0000:00:0a.0: ttyS6 at I/O 0x18800848 (irq = 140, base_baud = 115200) is a 16C950/954 ttyS7: detected caps 00000700 should be 00000500 0000:00:0a.0: ttyS7 at I/O 0x18800850 (irq = 140, base_baud = 115200) is a 16C950/954 ttyS8: detected caps 00000700 should be 00000500 0000:00:0a.0: ttyS8 at I/O 0x18800858 (irq = 140, base_baud = 115200) is a 16C950/954 loop: module loaded nbd: registered device at major 43 null: module loaded scsi host0: pata-rb532-cf ata1: PATA max PIO4 irq 149 Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011) tun: Universal TUN/TAP device driver, 1.6 tun: (C) 1999-2004 Max Krasnyansky ata1.00: CFA: HMS360404D5CF00, DN4OCA2A, max PIO4 ata1.00: 7999488 sectors, multi 0: LBA eth0: korina-0.10 04Mar2008 via_rhine: v1.10-LK1.5.1 2010-10-09 Written by Donald Becker PCI: Enabling device 0000:00:02.0 (0080 -> 0083) via-rhine 0000:00:02.0 eth1: VIA Rhine III at 0xc0012000, 00:0c:42:0e:8f:02, IRQ 142 via-rhine 0000:00:02.0 eth1: MII PHY found at address 1, status 0x786d advertising 05e1 Link 45e1 PCI: Enabling device 0000:00:03.0 (0080 -> 0083) via-rhine 0000:00:03.0 eth2: VIA Rhine III at 0xc0014100, 00:0c:42:0e:8f:03, IRQ 143 via-rhine 0000:00:03.0 eth2: MII PHY found at address 1, status 0x7869 advertising 05e1 Link 41e1 PCI: Enabling device 0000:00:04.0 (0000 -> 0002) ata1.00: configured for PIO4 scsi 0:0:0:0: Direct-Access ATA HMS360404D5CF00 CA2A PQ: 0 ANSI: 5 sd 0:0:0:0: [sda] 7999488 512-byte logical blocks: (4.10 GB/3.81 GiB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA ath: EEPROM regdomain: 0x809c ath: EEPROM indicates we should expect a country code ath: doing EEPROM country->regdmn map search ath: country maps to regdmn code: 0x52 ath: Country alpha2 being used: CN ath: Regpair used: 0x52 ieee80211 phy0: Selected rate control algorithm 'minstrel_ht' sda: sda1 sda2 sda3 ieee80211 phy0: Atheros AR9280 Rev:2 mem=0xc0020000, irq=142 sd 0:0:0:0: [sda] Attached SCSI removable disk aoe: AoE v85 initialised. rc32434_wdt: Stopped watchdog timer rc32434_wdt: Watchdog Timer version 1.0, timer margin: 20 sec NET: Registered protocol family 26 Netfilter messages via NETLINK v0.30. nf_conntrack version 0.5.0 (903 buckets, 3612 max) nf_tables: (c) 2007-2009 Patrick McHardy nf_tables_compat: (c) 2012 Pablo Neira Ayuso xt_time: kernel timezone is -0000 ip_tables: (C) 2000-2006 Netfilter Core Team arp_tables: (C) 2002 David S. Miller NET: Registered protocol family 17 Bridge firewalling registered Ebtables v2.0 registered EXT4-fs (sda3): couldn't mount as ext3 due to feature incompatibilities EXT4-fs (sda3): INFO: recovery required on readonly filesystem EXT4-fs (sda3): write access will be enabled during recovery random: nonblocking pool is initialized EXT4-fs (sda3): recovery complete EXT4-fs (sda3): mounted filesystem with ordered data mode. Opts: (null) VFS: Mounted root (ext4 filesystem) readonly on device 8:3. Freeing unused kernel memory: 188K EXT4-fs (sda3): re-mounted. Opts: (null) EXT4-fs (sda3): re-mounted. Opts: ---- 00:00.0 Non-VGA unclassified device: Integrated Device Technology, Inc. Device 0000 Subsystem: Device 0214:011d Flags: bus master, 66MHz, medium devsel, latency 60, IRQ 140 Memory at (32-bit, prefetchable) I/O ports at I/O ports at 00:02.0 Ethernet controller: VIA Technologies, Inc. VT6105/VT6106S [Rhine-III] (rev 86) Subsystem: AST Research Inc Device 086c Flags: bus master, stepping, medium devsel, latency 64, IRQ 142 I/O ports at 18800000 [size=256] Memory at 50014000 (32-bit, non-prefetchable) [size=256] Capabilities: [40] Power Management version 2 Kernel driver in use: via-rhine 00:03.0 Ethernet controller: VIA Technologies, Inc. VT6105/VT6106S [Rhine-III] (rev 86) Subsystem: AST Research Inc Device 086c Flags: bus master, stepping, medium devsel, latency 64, IRQ 143 I/O ports at 18800400 [size=256] Memory at 50014100 (32-bit, non-prefetchable) [size=256] Capabilities: [40] Power Management version 2 Kernel driver in use: via-rhine 00:04.0 Network controller: Atheros Communications Inc. Device 0029 (rev 01) Subsystem: Atheros Communications Inc. Device 2091 Flags: bus master, 66MHz, medium devsel, latency 168, IRQ 142 Memory at 50000000 (32-bit, non-prefetchable) [size=64K] Capabilities: [44] Power Management version 2 Kernel driver in use: ath9k 00:05.0 Serial controller: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Uart) (rev 01) (prog-if 06 [) Subsystem: Oxford Semiconductor Ltd Device 0000 Flags: medium devsel, IRQ 143 I/O ports at 18800800 [size=32] Memory at 50010000 (32-bit, non-prefetchable) [size=4K] I/O ports at 18800820 [size=32] Memory at 50011000 (32-bit, non-prefetchable) [size=4K] Capabilities: [40] Power Management version 2 Kernel driver in use: serial 00:05.1 Non-VGA unclassified device: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Disabled) (rev 01) Subsystem: Oxford Semiconductor Ltd Device 0000 Flags: medium devsel, IRQ 143 I/O ports at [disabled] I/O ports at [disabled] I/O ports at [disabled] Capabilities: [40] Power Management version 2 00:0a.0 Serial controller: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Uart) (rev 01) (prog-if 06 [) Subsystem: Oxford Semiconductor Ltd Device 0000 Flags: medium devsel, IRQ 140 I/O ports at 18800840 [size=32] Memory at 50012000 (32-bit, non-prefetchable) [size=4K] I/O ports at 18800860 [size=32] Memory at 50013000 (32-bit, non-prefetchable) [size=4K] Capabilities: [40] Power Management version 2 Kernel driver in use: serial 00:0a.1 Non-VGA unclassified device: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Disabled) (rev 01) Subsystem: Oxford Semiconductor Ltd Device 0000 Flags: medium devsel, IRQ 140 I/O ports at [disabled] I/O ports at [disabled] I/O ports at [disabled] Capabilities: [40] Power Management version 2 ---- what do you think? besides, kernels > 4.