Exactly same problem here with Asmobile (Asus) Z62HA. Cannot boot with newer 10.10, 11.04 kernel unless turning off acpi, but 10.04 works. $sudo lshw virgo description: Notebook product: Z62HA vendor: To Be Filled By O.E.M. version: 1.0 serial: NB-1234567890 width: 64 bits capabilities: smbios-2.4 dmi-2.4 vsyscall64 vsyscall32 configuration: boot=normal chassis=notebook uuid=00020003-0004-0005-0006-000700080009 *-core description: Motherboard product: Z62HA vendor: To Be Filled By O.E.M. physical id: 0 version: 1.00 serial: NB-0123456789 slot: To Be Filled By O.E.M. *-firmware description: BIOS vendor: American Megatrends Inc. physical id: 0 version: 0304 (01/30/2008) size: 64KiB capacity: 960KiB capabilities: isa pci pcmcia pnp apm upgrade shadowing escd cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer int10video acpi usb agp ls120boot zipboot biosbootspecification *-cpu description: CPU product: Intel(R) Core(TM)2 Duo CPU T5750 @ 2.00GHz vendor: Intel Corp. physical id: 4 bus info: cpu@0 version: Intel(R) Core(TM)2 Duo CPU T5750 @ 2.00GHz serial: To Be Filled By O.E.M. slot: CPU 1 size: 2GHz capacity: 2GHz width: 64 bits clock: 166MHz capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx x86-64 constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm lahf_lm *-cache:0 description: L1 cache physical id: 5 slot: L1-Cache size: 64KiB capacity: 64KiB capabilities: internal write-back data *-cache:1 description: L2 cache physical id: 6 slot: L2-Cache size: 2MiB capacity: 2MiB capabilities: internal write-back instruction *-memory description: System Memory physical id: 2a slot: System board or motherboard size: 3GiB *-bank:0 description: DIMM SDRAM Synchronous product: PartNum0 vendor: Manufacturer0 physical id: 0 serial: SerNum0 slot: DIMM0 size: 1GiB width: 64 bits *-bank:1 description: DIMM SDRAM Synchronous product: PartNum1 vendor: Manufacturer1 physical id: 1 serial: SerNum1 slot: DIMM1 size: 2GiB width: 64 bits *-generic UNCLAIMED physical id: 20100423 bus info: parisc@20100423 *-pci description: Host bridge product: 671MX vendor: Silicon Integrated Systems [SiS] physical id: 100 bus info: pci@0000:00:00.0 version: 00 width: 32 bits clock: 33MHz configuration: latency=32 *-pci:0 description: PCI bridge product: PCI-to-PCI bridge vendor: Silicon Integrated Systems [SiS] physical id: 1 bus info: pci@0000:00:01.0 version: 00 width: 32 bits clock: 33MHz capabilities: pci pciexpress msi pm normal_decode bus_master cap_list configuration: driver=pcieport resources: irq:40 ioport:e000(size=4096) memory:fdf00000-fdffffff ioport:d0000000(size=268435456) *-display description: VGA compatible controller product: Mobility Radeon HD 2400 vendor: ATI Technologies Inc physical id: 0 bus info: pci@0000:01:00.0 version: 00 width: 32 bits clock: 33MHz capabilities: pm pciexpress msi vga_controller bus_master cap_list rom configuration: driver=fglrx_pci latency=0 resources: irq:43 memory:d0000000-dfffffff ioport:e800(size=256) memory:fdff0000-fdffffff memory:fdfc0000-fdfdffff *-isa description: ISA bridge product: SiS968 [MuTIOL Media IO] vendor: Silicon Integrated Systems [SiS] physical id: 2 bus info: pci@0000:00:02.0 version: 01 width: 32 bits clock: 33MHz capabilities: isa bus_master configuration: latency=0 *-ide description: IDE interface product: 5513 [IDE] vendor: Silicon Integrated Systems [SiS] physical id: 2.5 bus info: pci@0000:00:02.5 version: 01 width: 32 bits clock: 33MHz capabilities: ide pm bus_master cap_list configuration: driver=pata_sis latency=128 resources: irq:16 ioport:dc00(size=8) ioport:d800(size=4) ioport:d400(size=8) ioport:d000(size=4) ioport:cc00(size=16) *-usb:0 description: USB Controller product: USB 1.1 Controller vendor: Silicon Integrated Systems [SiS] physical id: 3 bus info: pci@0000:00:03.0 version: 0f width: 32 bits clock: 33MHz capabilities: ohci bus_master configuration: driver=ohci_hcd latency=64 maxlatency=80 resources: irq:20 memory:fdefd000-fdefdfff *-usb:1 description: USB Controller product: USB 1.1 Controller vendor: Silicon Integrated Systems [SiS] physical id: 3.1 bus info: pci@0000:00:03.1 version: 0f width: 32 bits clock: 33MHz capabilities: ohci bus_master configuration: driver=ohci_hcd latency=64 maxlatency=80 resources: irq:21 memory:fdefe000-fdefefff *-usb:2 description: USB Controller product: USB 2.0 Controller vendor: Silicon Integrated Systems [SiS] physical id: 3.3 bus info: pci@0000:00:03.3 version: 00 width: 32 bits clock: 33MHz capabilities: pm ehci bus_master cap_list configuration: driver=ehci_hcd latency=64 maxlatency=80 resources: irq:22 memory:fdeff000-fdefffff *-storage description: SATA controller product: AHCI IDE Controller (0106) vendor: Silicon Integrated Systems [SiS] physical id: 5 bus info: pci@0000:00:05.0 logical name: scsi2 version: 03 width: 32 bits clock: 33MHz capabilities: storage pm ahci_1.0 bus_master cap_list emulated configuration: driver=ahci latency=64 resources: irq:17 ioport:c800(size=8) ioport:c400(size=4) ioport:c000(size=8) ioport:bc00(size=4) ioport:b800(size=32) memory:fdefcc00-fdefcdff *-disk description: ATA Disk product: Hitachi HTS72505 vendor: Hitachi physical id: 0.0.0 bus info: scsi@2:0.0.0 logical name: /dev/sda version: PC4O serial: 101103PCK404VLKTGGMJ size: 465GiB (500GB) capabilities: partitioned partitioned:dos configuration: ansiversion=5 signature=0004636f *-volume:0 description: EXT4 volume vendor: Linux physical id: 1 bus info: scsi@2:0.0.0,1 logical name: /dev/sda1 logical name: /boot version: 1.0 serial: c84d77b7-c2f0-45e9-8876-cd5204c03013 size: 381MiB capacity: 381MiB capabilities: primary bootable journaled extended_attributes huge_files dir_nlink extents ext4 ext2 initialized configuration: created=2010-11-27 20:09:52 filesystem=ext4 lastmountpoint=/boot�_�����6T�wY����u���������������_����� modified=2011-04-30 18:46:07 mount.fstype=ext4 mount.options=rw,relatime,barrier=1,data=ordered mounted=2011-04-30 18:44:46 state=mounted *-volume:1 description: Linux filesystem partition physical id: 2 bus info: scsi@2:0.0.0,2 logical name: /dev/sda2 capacity: 46GiB capabilities: primary *-volume:2 description: EXT4 volume vendor: Linux physical id: 3 bus info: scsi@2:0.0.0,3 logical name: /dev/sda3 logical name: / version: 1.0 serial: 52636b90-5f75-4d43-8268-030f69b57d77 size: 46GiB capacity: 46GiB capabilities: primary journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized configuration: created=2010-11-27 20:09:52 filesystem=ext4 lastmountpoint=/�|�������@�����ȍ����@�k�����������}��������� modified=2011-03-25 17:23:24 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,barrier=1,data=ordered mounted=2011-04-30 18:49:44 state=mounted *-volume:3 description: Extended partition physical id: 4 bus info: scsi@2:0.0.0,4 logical name: /dev/sda4 size: 372GiB capacity: 372GiB capabilities: primary extended partitioned partitioned:extended *-logicalvolume:0 description: Linux swap / Solaris partition physical id: 5 logical name: /dev/sda5 capacity: 8582MiB capabilities: nofs *-logicalvolume:1 description: Linux filesystem partition physical id: 6 logical name: /dev/sda6 logical name: /home capacity: 279GiB configuration: mount.fstype=ext4 mount.options=rw,relatime,barrier=1,data=ordered state=mounted *-logicalvolume:2 description: Linux filesystem partition physical id: 7 logical name: /dev/sda7 capacity: 84GiB *-pci:1 description: PCI bridge product: PCI-to-PCI bridge vendor: Silicon Integrated Systems [SiS] physical id: 6 bus info: pci@0000:00:06.0 version: 00 width: 32 bits clock: 33MHz capabilities: pci msi pciexpress pm normal_decode bus_master cap_list configuration: driver=pcieport resources: irq:41 ioport:1000(size=4096) memory:fe000000-feafffff ioport:fa000000(size=50331648) *-pci:2 description: PCI bridge product: PCI-to-PCI bridge vendor: Silicon Integrated Systems [SiS] physical id: 7 bus info: pci@0000:00:07.0 version: 00 width: 32 bits clock: 33MHz capabilities: pci msi pciexpress pm normal_decode bus_master cap_list configuration: driver=pcieport resources: irq:42 memory:feb00000-febfffff *-network description: Wireless interface product: BCM4312 802.11b/g LP-PHY vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:05:00.0 logical name: eth1 version: 01 serial: 00:1f:3a:8c:0f:80 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=wl0 driverversion=5.60.48.36 ip=192.168.10.150 latency=0 multicast=yes wireless=IEEE 802.11bg physical id: b bus info: pci@0000:00:0b.0 version: 22 width: 32 bits clock: 33MHz capabilities: pm bus_master cap_list configuration: driver=sdhci-pci latency=64 resources: irq:18 memory:fdefc000-fdefc0ff *-generic:1 description: System peripheral product: R5C843 MMC Host Controller vendor: Ricoh Co Ltd physical id: b.1 bus info: pci@0000:00:0b.1 version: 12 width: 32 bits clock: 33MHz capabilities: pm bus_master cap_list configuration: driver=sdhci-pci latency=64 resources: irq:18 memory:fdefc400-fdefc4ff *-generic:2 UNCLAIMED description: System peripheral product: R5C592 Memory Stick Bus Host Adapter vendor: Ricoh Co Ltd physical id: b.2 bus info: pci@0000:00:0b.2 version: 12 width: 32 bits clock: 33MHz capabilities: pm bus_master cap_list configuration: latency=64 resources: memory:fdefc800-fdefc8ff *-network description: Ethernet interface product: RTL-8110SC/8169SC Gigabit Ethernet vendor: Realtek Semiconductor Co., Ltd. physical id: d bus info: pci@0000:00:0d.0 logical name: eth0 version: 10 serial: 00:1f:c6:56:f5:b7 size: 10MB/s capacity: 1GB/s width: 32 bits clock: 66MHz capabilities: pm bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half latency=64 link=no maxlatency=64 mingnt=32 multicast=yes port=MII speed=10MB/s resources: irq:18 ioport:b400(size=256) memory:fdefbc00-fdefbcff memory:fdec0000-fdedffff *-multimedia description: Audio device product: Azalia Audio Controller vendor: Silicon Integrated Systems [SiS] physical id: f bus info: pci@0000:00:0f.0 version: 00 width: 32 bits clock: 33MHz capabilities: pm bus_master cap_list configuration: driver=HDA Intel latency=0 maxlatency=11 mingnt=52 resources: irq:18 memory:fdef4000-fdef7fff