Argh, after a period of perfect w-lan connectivity with SuSE 9.3, 10.0 causes agony again. After the system update, wireless didn't work. I then installed the ipw-firmware package; after configuring the w-lan interface it worked fore a few hours until I rebooted. Since then, the wireless connection has gone. I tried to install the latest ipw2200 and ieee80211 versions, but neither compiled. I then reinstalled the original SuSE 10.0 kernel modules (via system repair), rebuilt ipw-firmware from the src-package (as I picked up in a SuSE mailing-list), but still, no connectivity. At this stage, I just don't know what's wrong: kernel modules, firmware, or network setup. And it all worked so nicely with 9.3! Any help would be greatly appreciated. Here's the output from dmesg: Linux version 2.6.13-15-default (geeko@buildhost) (gcc version 4.0.2 20050901 (prerelease) (SUSE Linux)) #1 Tue Sep 13 14:56:15 UTC 2005 BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 000000001f740000 (usable) BIOS-e820: 000000001f740000 - 000000001f750000 (ACPI data) BIOS-e820: 000000001f750000 - 000000001f800000 (ACPI NVS) 0MB HIGHMEM available. 503MB LOWMEM available. On node 0 totalpages: 128832 DMA zone: 4096 pages, LIFO batch:1 Normal zone: 124736 pages, LIFO batch:31 HighMem zone: 0 pages, LIFO batch:1 DMI 2.3 present. ACPI: RSDP (v000 ACPIAM ) @ 0x000f4fd0 ACPI: RSDT (v001 A M I OEMRSDT 0x07000422 MSFT 0x00000097) @ 0x1f740000 ACPI: FADT (v002 A M I OEMFACP 0x07000422 MSFT 0x00000097) @ 0x1f740200 ACPI: MADT (v001 A M I OEMAPIC 0x07000422 MSFT 0x00000097) @ 0x1f740300 ACPI: OEMB (v001 A M I OEMBIOS 0x07000422 MSFT 0x00000097) @ 0x1f750040 ACPI: DSDT (v001 0ABBD 0ABBD001 0x00000001 MSFT 0x02000001) @ 0x00000000 ACPI: PM-Timer IO Port: 0xe408 ACPI: local apic disabled Allocating PCI resources starting at 1f800000 (gap: 1f800000:e0800000) Built 1 zonelists Kernel command line: root=/dev/hda3 vga=788 selinux=0 resume=/dev/hda4 splash=silent bootsplash: silent mode. Initializing CPU#0 PID hash table entries: 2048 (order: 11, 32768 bytes) Detected 1500.329 MHz processor. Using pmtmr for high-res timesource Console: colour dummy device 80x25 Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) Memory: 505296k/515328k available (2028k kernel code, 9516k reserved, 700k data, 204k init, 0k highmem) Checking if this processor honours the WP bit even in supervisor mode... Ok. Calibrating delay using timer specific routine.. 3002.75 BogoMIPS (lpj=6005518) Security Framework v1.0.0 initialized SELinux: Disabled at boot. Mount-cache hash table entries: 512 CPU: After generic identify, caps: afe9fbbf 00000000 00000000 00000000 00000180 00000000 00000000 CPU: After vendor identify, caps: afe9fbbf 00000000 00000000 00000000 00000180 00000000 00000000 CPU: L1 I cache: 32K, L1 D cache: 32K CPU: L2 cache: 2048K CPU: After all inits, caps: afe9fbbf 00000000 00000000 00000040 00000180 00000000 00000000 Intel machine check architecture supported. Intel machine check reporting enabled on CPU#0. mtrr: v2.0 (20020519) CPU: Intel(R) Pentium(R) M processor 1.50GHz stepping 06 Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Checking 'hlt' instruction... OK. checking if image is initramfs... it is Freeing initrd memory: 1701k freed ACPI: Looking for DSDT in initrd... not found! not found! ACPI: setting ELCR to 0200 (from 00b8) NET: Registered protocol family 16 ACPI: bus type pci registered PCI: Using configuration type 1 ACPI: Subsystem revision 20050408 ACPI: Interpreter enabled ACPI: Using PIC for interrupt routing ACPI: PCI Root Bridge [PCI0] (0000:00) PCI: Probing PCI hardware (bus 00) ACPI: Assume root bridge [\_SB_.PCI0] segment is 0 Boot video device is 0000:00:02.0 PCI: Enabled i801 SMBus device PCI: Ignoring BAR0-3 of IDE controller 0000:00:1f.1 PCI: Transparent bridge - 0000:00:1e.0 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P1._PRT] ACPI: Embedded Controller [EC0] (gpe 28) ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 *5 6 7 11 12) ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 12) *0, disabled. ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 *7 12) ACPI: PCI Interrupt Link [LNKD] (IRQs 3 *4 5 6 7 12) ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 12) *0, disabled. ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 12) *0, disabled. ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 12) *0, disabled. ACPI: PCI Interrupt Link [LNKH] (IRQs *3 4 5 6 7 12) ACPI: Power Resource [GFAN] (off) Linux Plug and Play Support v0.97 (c) Adam Belay pnp: PnP ACPI init pnp: PnP ACPI: found 12 devices PCI: Using ACPI for IRQ routing PCI: If a device doesn't work, try "pci=routeirq". If it helps, post a report TC classifier action (bugs to netdev@vger.kernel.org cc hadi@cyberus.ca) PCI: Ignore bogus resource 6 [0:0] of 0000:00:02.0 PCI: Bus 2, cardbus bridge: 0000:01:03.0 IO window: 00001000-00001fff IO window: 00002000-00002fff PREFETCH window: 20000000-21ffffff MEM window: 22000000-23ffffff PCI: Bus 6, cardbus bridge: 0000:01:03.1 IO window: 00003000-00003fff IO window: 00004000-00004fff PREFETCH window: 24000000-25ffffff MEM window: 26000000-27ffffff PCI: Bridge: 0000:00:1e.0 IO window: c000-cfff MEM window: fe700000-fe8fffff PREFETCH window: de500000-de6fffff PCI: Setting latency timer of device 0000:00:1e.0 to 64 ACPI-0212: *** Warning: Device is not power manageable ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 7 PCI: setting IRQ 7 as level-triggered ACPI: PCI Interrupt 0000:01:03.0[A] -> Link [LNKB] -> GSI 7 (level, low) -> IRQ 7 ACPI-0212: *** Warning: Device is not power manageable ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 7 ACPI: PCI Interrupt 0000:01:03.1[B] -> Link [LNKC] -> GSI 7 (level, low) -> IRQ 7 apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16ac) apm: overridden by ACPI. audit: initializing netlink socket (disabled) audit(1133463198.780:1): initialized Total HugeTLB memory allocated, 0 VFS: Disk quotas dquot_6.5.1 Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) Initializing Cryptographic API vesafb: framebuffer at 0xf0000000, mapped to 0xe0080000, using 3750k, total 8000k vesafb: mode is 800x600x16, linelength=1600, pages=7 vesafb: protected mode interface info at 00ff:44f0 vesafb: scrolling: redraw vesafb: Truecolor: size=0:5:6:5, shift=0:11:5:0 bootsplash 3.1.6-2004/03/31: looking for picture...<6> silentjpeg size 51518 bytes,<6>...found (800x600, 8809 bytes, v3). Console: switching to colour frame buffer device 99x34 fb0: VESA VGA frame buffer device isapnp: Scanning for PnP cards... isapnp: No Plug & Play device found Real Time Clock Driver v1.12 PNP: PS/2 Controller [PNP0303:PS2K,PNP0f03:PS2M] at 0x60,0x64 irq 1,12 i8042.c: Detected active multiplexing controller, rev 1.1. serio: i8042 AUX0 port at 0x60,0x64 irq 12 serio: i8042 AUX1 port at 0x60,0x64 irq 12 serio: i8042 AUX2 port at 0x60,0x64 irq 12 serio: i8042 AUX3 port at 0x60,0x64 irq 12 serio: i8042 KBD port at 0x60,0x64 irq 1 Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled ACPI-0212: *** Warning: Device is not power manageable ACPI: PCI Interrupt 0000:00:1f.6[B] -> Link [LNKB] -> GSI 7 (level, low) -> IRQ 7 ACPI: PCI interrupt for device 0000:00:1f.6 disabled io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered Floppy drive(s): fd0 is 1.44M floppy0: no floppy controllers found RAMDISK driver initialized: 16 RAM disks of 64000K size 1024 blocksize loop: loaded (max 8 devices) mice: PS/2 mouse device common for all mice input: PC Speaker md: md driver 0.90.2 MAX_MD_DEVS=256, MD_SB_DISKS=27 md: bitmap version 3.38 NET: Registered protocol family 2 IP route cache hash table entries: 4096 (order: 2, 16384 bytes) TCP established hash table entries: 16384 (order: 5, 131072 bytes) TCP bind hash table entries: 16384 (order: 4, 65536 bytes) TCP: Hash tables configured (established 16384 bind 16384) TCP reno registered NET: Registered protocol family 1 Using IPI Shortcut mode ACPI wakeup devices: P0P1 LAN0 CBS0 CBS1 P394 MPCI MODM USB1 USB2 USB3 EHCI SLPB ACPI: (supports S0 S1 S3 S4 S5) Freeing unused kernel memory: 204k freed Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx input: AT Translated Set 2 keyboard on isa0060/serio0 ICH4: IDE controller at PCI slot 0000:00:1f.1 PCI: Enabling device 0000:00:1f.1 (0005 -> 0007) ACPI: PCI Interrupt 0000:00:1f.1[A] -> Link [LNKC] -> GSI 7 (level, low) -> IRQ 7 ICH4: chipset revision 3 ICH4: not 100% native mode: will probe irqs later ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:DMA, hdd:pio Probing IDE interface ide0... hda: IC25N040ATMR04-0, ATA DISK drive ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 hda: max request size: 1024KiB hda: 78140160 sectors (40007 MB) w/1740KiB Cache, CHS=16383/255/63, UDMA(100) hda: cache flushes supported hda: hda1 hda2 hda3 hda4 Probing IDE interface ide1... hdc: UJDA755 DVD/CDRW, ATAPI CD/DVD-ROM drive ide1 at 0x170-0x177,0x376 on irq 15 ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3]) ACPI: Processor [CPU1] (supports 8 throttling states) ACPI: Thermal Zone [THRM] (63 C) Synaptics Touchpad, model: 1, fw: 5.9, id: 0x116eb1, caps: 0xa04713/0x0 input: SynPS/2 Synaptics TouchPad on isa0060/serio4 hdc: ATAPI 24X DVD-ROM CD-R/RW drive, 2048kB Cache, UDMA(33) Uniform CD-ROM driver Revision: 3.20 ACPI: Fan [FN00] (on) Attempting manual resume swsusp: Suspend partition has wrong signature? ReiserFS: hda3: found reiserfs format "3.6" with standard journal ReiserFS: hda3: using ordered data mode ReiserFS: hda3: journal params: device hda3, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30 ReiserFS: hda3: checking transaction log (hda3) ReiserFS: hda3: Using r5 hash to sort names md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. Adding 915696k swap on /dev/hda4. Priority:42 extents:1 device-mapper: 4.4.0-ioctl (2005-01-12) initialised: dm-devel@redhat.com FAT: utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive! FAT: utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive! PCI: Enabling device 0000:00:1f.5 (0005 -> 0007) ACPI: PCI Interrupt 0000:00:1f.5[B] -> Link [LNKB] -> GSI 7 (level, low) -> IRQ 7 PCI: Setting latency timer of device 0000:00:1f.5 to 64 ieee80211_crypt: module not supported by Novell, setting U taint flag. ieee80211_crypt: registered algorithm 'NULL' ieee80211: module not supported by Novell, setting U taint flag. ieee80211: 802.11 data/management/control stack, 1.0.3 ieee80211: Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com> ALSA sound/pci/intel8x0.c:603: codec_semaphore: semaphore is not ready [0x1][0x700300] [last line repeated several times] ALSA sound/pci/ac97/ac97_patch.c:1453: ERROR (codecs[0] | codecs[1] | codecs[2]) (called from e06e09d8) ALSA sound/pci/intel8x0.c:603: codec_semaphore: semaphore is not ready [0x1][0x700300] [last line repeated several times] ipw2200: module not supported by Novell, setting U taint flag. ipw2200: Intel(R) PRO/Wireless 2200/2915 Network Driver, 1.0.6 ipw2200: Copyright(c) 2003-2004 Intel Corporation ALSA sound/pci/intel8x0.c:603: codec_semaphore: semaphore is not ready [0x1][0x700300] [last line repeated several times] intel8x0_measure_ac97_clock: measured 54202 usecs intel8x0: clocking to 48000 ACPI-0212: *** Warning: Device is not power manageable ACPI: PCI Interrupt 0000:01:05.0[A] -> Link [LNKC] -> GSI 7 (level, low) -> IRQ 7 ipw2200: Detected Intel PRO/Wireless 2200BG Network Connection ipw2200: ipw-2.3-boot.fw load failed: Reason -2 ipw2200: Unable to load firmware: 0xFFFFFFFE ipw2200: failed to register network device ACPI: PCI interrupt for device 0000:01:05.0 disabled ipw2200: probe of 0000:01:05.0 failed with error -5 lp: driver loaded but no devices found ALSA sound/pci/intel8x0.c:603: codec_semaphore: semaphore is not ready [0x1][0x700300] ALSA sound/pci/intel8x0.c:617: codec_write 0: semaphore is not ready for register 0x2 ALSA sound/pci/intel8x0.c:603: codec_semaphore: semaphore is not ready [0x1][0x700300] ALSA sound/pci/intel8x0.c:617: codec_write 0: semaphore is not ready for register 0x6 ALSA sound/pci/intel8x0.c:603: codec_semaphore: semaphore is not ready [0x1][0x700300] ALSA sound/pci/intel8x0.c:617: codec_write 0: semaphore is not ready for register 0xa ALSA sound/pci/intel8x0.c:603: codec_semaphore: semaphore is not ready [0x1][0x700300] ALSA sound/pci/intel8x0.c:617: codec_write 0: semaphore is not ready for register 0xe ALSA sound/pci/intel8x0.c:603: codec_semaphore: semaphore is not ready [0x1][0x700300] ALSA sound/pci/intel8x0.c:617: codec_write 0: semaphore is not ready for register 0x14 ALSA sound/pci/intel8x0.c:603: codec_semaphore: semaphore is not ready [0x1][0x700300] ALSA sound/pci/intel8x0.c:617: codec_write 0: semaphore is not ready for register 0x18 usbcore: registered new driver usbfs usbcore: registered new driver hub USB Universal Host Controller Interface driver v2.3 ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 5 PCI: setting IRQ 5 as level-triggered ACPI: PCI Interrupt 0000:00:1d.0[A] -> Link [LNKA] -> GSI 5 (level, low) -> IRQ 5 PCI: Setting latency timer of device 0000:00:1d.0 to 64 uhci_hcd 0000:00:1d.0: UHCI Host Controller uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 1 uhci_hcd 0000:00:1d.0: irq 5, io base 0x0000d480 hub 1-0:1.0: USB hub found hub 1-0:1.0: 2 ports detected Linux agpgart interface v0.101 (c) Dave Jones agpgart: Detected an Intel 855 Chipset. agpgart: Detected 8060K stolen memory. agpgart: AGP aperture is 128M @ 0xf0000000 ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 4 PCI: setting IRQ 4 as level-triggered ACPI: PCI Interrupt 0000:00:1d.1[B] -> Link [LNKD] -> GSI 4 (level, low) -> IRQ 4 PCI: Setting latency timer of device 0000:00:1d.1 to 64 uhci_hcd 0000:00:1d.1: UHCI Host Controller uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 2 uhci_hcd 0000:00:1d.1: irq 4, io base 0x0000d800 hub 2-0:1.0: USB hub found hub 2-0:1.0: 2 ports detected ACPI: PCI Interrupt 0000:00:1d.2[C] -> Link [LNKC] -> GSI 7 (level, low) -> IRQ 7 PCI: Setting latency timer of device 0000:00:1d.2 to 64 uhci_hcd 0000:00:1d.2: UHCI Host Controller uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 3 uhci_hcd 0000:00:1d.2: irq 7, io base 0x0000d880 hub 3-0:1.0: USB hub found hub 3-0:1.0: 2 ports detected ACPI-0212: *** Warning: Device is not power manageable ACPI: PCI Interrupt Link [LNKH] enabled at IRQ 3 PCI: setting IRQ 3 as level-triggered ACPI: PCI Interrupt 0000:00:1d.7[D] -> Link [LNKH] -> GSI 3 (level, low) -> IRQ 3 PCI: Setting latency timer of device 0000:00:1d.7 to 64 ehci_hcd 0000:00:1d.7: EHCI Host Controller ehci_hcd 0000:00:1d.7: debug port 1 ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 4 ehci_hcd 0000:00:1d.7: irq 3, io mem 0xfebff800 PCI: cache line size of 32 is not supported by device 0000:00:1d.7 ehci_hcd 0000:00:1d.7: USB 2.0 initialized, EHCI 1.00, driver 10 Dec 2004 hub 4-0:1.0: USB hub found hub 4-0:1.0: 6 ports detected hw_random: RNG not detected pci_hotplug: PCI Hot Plug PCI Core version: 0.5 shpchp: shpc_init : shpc_cap_offset == 0 shpchp: Standard Hot Plug PCI Controller Driver version: 0.4 usb 4-2: new high speed USB device using ehci_hcd and address 2 ACPI: PCI Interrupt 0000:01:03.0[A] -> Link [LNKB] -> GSI 7 (level, low) -> IRQ 7 Yenta: CardBus bridge found at 0000:01:03.0 [1043:1824] Yenta: ISA IRQ mask 0x0400, PCI irq 7 Socket status: 30000006 pcmcia: parent PCI bridge I/O window: 0xc000 - 0xcfff cs: IO port probe 0xc000-0xcfff: clean. pcmcia: parent PCI bridge Memory window: 0xfe700000 - 0xfe8fffff pcmcia: parent PCI bridge Memory window: 0xde500000 - 0xde6fffff ACPI: PCI Interrupt 0000:01:03.1[B] -> Link [LNKC] -> GSI 7 (level, low) -> IRQ 7 Yenta: CardBus bridge found at 0000:01:03.1 [1043:1824] ieee1394: Initialized config rom entry `ip1394' 8139too Fast Ethernet driver 0.9.27 Yenta: ISA IRQ mask 0x0400, PCI irq 7 Socket status: 30000006 pcmcia: parent PCI bridge I/O window: 0xc000 - 0xcfff cs: IO port probe 0xc000-0xcfff: clean. pcmcia: parent PCI bridge Memory window: 0xfe700000 - 0xfe8fffff pcmcia: parent PCI bridge Memory window: 0xde500000 - 0xde6fffff ohci1394: $Rev: 1299 $ Ben Collins <bcollins@debian.org> ACPI-0212: *** Warning: Device is not power manageable ACPI: PCI Interrupt 0000:01:03.2[C] -> Link [LNKA] -> GSI 5 (level, low) -> IRQ 5 ohci1394: fw-host0: OHCI-1394 1.0 (PCI): IRQ=[5] MMIO=[fe8ff000-fe8ff7ff] Max Packet=[2048] ACPI-0212: *** Warning: Device is not power manageable ACPI: PCI Interrupt 0000:01:04.0[A] -> Link [LNKA] -> GSI 5 (level, low) -> IRQ 5 eth0: RealTek RTL8139 at 0xe08b0800, 00:11:2f:9c:3c:79, IRQ 5 eth0: Identified 8139 chip type 'RTL-8101' SCSI subsystem initialized Initializing USB Mass Storage driver... scsi0 : SCSI emulation for USB Mass Storage devices usb-storage: device found at 2 usb-storage: waiting for device to settle before scanning usbcore: registered new driver usb-storage USB Mass Storage support registered. ieee1394: Host added: ID:BUS[0-00:1023] GUID[00e0180003203011] cs: IO port probe 0x3e0-0x4ff: excluding 0x4d0-0x4d7 cs: IO port probe 0x100-0x3af: clean. cs: IO port probe 0xc00-0xcff: clean. cs: IO port probe 0x820-0x8ff: clean. cs: IO port probe 0xa00-0xaff: clean. cs: IO port probe 0x3e0-0x4ff: excluding 0x4d0-0x4d7 cs: IO port probe 0x100-0x3af: clean. cs: IO port probe 0xc00-0xcff: clean. cs: IO port probe 0x820-0x8ff: clean. cs: IO port probe 0xa00-0xaff: clean. Vendor: TOSHIBA Model: MK4004GAH Rev: JC00 Type: Direct-Access ANSI SCSI revision: 00 usb-storage: device scan complete SCSI device sda: 78126048 512-byte hdwr sectors (40001 MB) sda: assuming drive cache: write through SCSI device sda: 78126048 512-byte hdwr sectors (40001 MB) sda: assuming drive cache: write through sda: sda1 Attached scsi disk sda at scsi0, channel 0, id 0, lun 0 Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0, type 0 eth0: link down NET: Registered protocol family 17 BIOS EDD facility v0.16 2004-Jun-25, 2 devices found NET: Registered protocol family 10 Disabled Privacy Extensions on device c036b920(lo) IPv6 over IPv4 tunneling driver ACPI: AC Adapter [AC0] (on-line) eth0: no IPv6 routers present ACPI: Battery Slot [BAT0] (battery present) ACPI: Power Button (FF) [PWRF] ACPI: Sleep Button (CM) [SLPB] ACPI: Lid Switch [LID] Asus Laptop ACPI Extras version 0.29-SUSE M5N model detected, supported subfs 0.9 ALSA sound/pci/intel8x0.c:603: codec_semaphore: semaphore is not ready [0x1][0x700300] ALSA sound/pci/intel8x0.c:631: codec_read 0: semaphore is not ready for register 0x32 ACPI-1048: *** Warning: Failed to acquire semaphore[df723ee0|1|0], AE_TIME [last line repeated several times] eth0: link up, 100Mbps, full-duplex, lpa 0x41E1