I just updated with the kernel from the PPA from Kamal and we are back to normal. Thanks a lot.
However, there is something else. One out of 3 or 4 times, when I turn the computer on I get this weird error.
1. When booting up, the kernel ring buffer is printed out on the screen. This usually does not happen. (When it does, I know I will have to restart ubuntu again).
2. The fan starts going crazy, it speeds up in several stages until maximum speed is reached (and remains like that).
3. I cannot adjust the brightness. I have to restart (sometimes twice) to get a normal session.
The funny thing is that it is not always like that. I had a look at dmesg and I got the following excerpt from it:
I just updated with the kernel from the PPA from Kamal and we are back to normal. Thanks a lot.
However, there is something else. One out of 3 or 4 times, when I turn the computer on I get this weird error.
1. When booting up, the kernel ring buffer is printed out on the screen. This usually does not happen. (When it does, I know I will have to restart ubuntu again).
2. The fan starts going crazy, it speeds up in several stages until maximum speed is reached (and remains like that).
3. I cannot adjust the brightness. I have to restart (sometimes twice) to get a normal session.
The funny thing is that it is not always like that. I had a look at dmesg and I got the following excerpt from it:
[ 1.935348] ------------[ cut here ]------------ buildd/ linux-2. 6.35/kernel/ workqueue. c:312! pci0000: 00/0000: 00:1d.0/ usb2/2- 1/bcdDevice mjgbacklight1- Ubuntu LL1 /Lenovo IdeaPad Z ffffffff8107af1 9>] [<ffffffff8107a f19>] queue_work_ on+0x49/ 0x60 ec5d50 EFLAGS: 00010286 0(0000) GS:ffff880001e0 0000(0000) knlGS:000000000 0000000 f6f>] queue_work+ 0x1f/0x30 f98>] schedule_ work+0x18/ 0x20 2e2>] power_supply_ changed+ 0x12/0x20 490>] acpi_battery_ notify+ 0x9d/0xa6 8c5>] ? acpi_os_ execute_ deferred+ 0x0/0x36 a85>] acpi_device_ notify+ 0x19/0x1b 955>] acpi_ev_ notify_ dispatch+ 0x67/0x7e 8ee>] acpi_os_ execute_ deferred+ 0x29/0x36 775>] run_workqueue+ 0xc5/0x1a0 8f3>] worker_ thread+ 0xa3/0x110 620>] ? autoremove_ wake_function+ 0x0/0x40 850>] ? worker_ thread+ 0x0/0x110 0c6>] kthread+0x96/0xa0 ee4>] kernel_ thread_ helper+ 0x4/0x10 030>] ? kthread+0x0/0xa0 ee0>] ? kernel_ thread_ helper+ 0x0/0x10 f19>] queue_work_ on+0x49/ 0x60
[ 1.935410] kernel BUG at /build/
[ 1.935520] invalid opcode: 0000 [#1] SMP
[ 1.935637] last sysfs file: /sys/devices/
[ 1.935684] CPU 0
[ 1.935714] Modules linked in: ahci libahci atl1c
[ 1.935870]
[ 1.935900] Pid: 36, comm: kacpi_notify Not tainted 2.6.35-24-generic #40+kamal~
[ 1.935963] RIP: 0010:[<
[ 1.936042] RSP: 0018:ffff880152
[ 1.936081] RAX: ffff880150b62c90 RBX: ffff880150b62c00 RCX: 0000000000000000
[ 1.936126] RDX: ffff880150b62c88 RSI: ffff88015350b1c0 RDI: 0000000000000000
[ 1.936170] RBP: ffff880152ec5d50 R08: 0000000000000000 R09: 0000000000000000
[ 1.936214] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000080
[ 1.936258] R13: ffff88014f854000 R14: ffff880152564800 R15: ffff880152ec5fd8
[ 1.936303] FS: 000000000000000
[ 1.936350] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 1.936390] CR2: 00007f57c3a08560 CR3: 0000000001a2a000 CR4: 00000000000006f0
[ 1.936436] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1.936479] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 1.936524] Process kacpi_notify (pid: 36, threadinfo ffff880152ec4000, task ffff880152eb16e0)
[ 1.936611] Stack:
[ 1.936660] ffff880152ec5d60 ffffffff8107af6f ffff880152ec5d70 ffffffff8107af98
[ 1.936798] <0> ffff880152ec5d80 ffffffff814402e2 ffff880152ec5db0 ffffffff81339490
[ 1.937002] <0> ffff880150794c80 ffff880151879798 ffffffff8130a8c5 ffff880001e19000
[ 1.937251] Call Trace:
[ 1.937305] [<ffffffff8107a
[ 1.937364] [<ffffffff8107a
[ 1.937426] [<ffffffff81440
[ 1.937488] [<ffffffff81339
[ 1.937551] [<ffffffff8130a
[ 1.937614] [<ffffffff8130d
[ 1.937676] [<ffffffff8131b
[ 1.937740] [<ffffffff8130a
[ 1.937802] [<ffffffff8107a
[ 1.937864] [<ffffffff8107a
[ 1.937924] [<ffffffff8107f
[ 1.937986] [<ffffffff8107a
[ 1.938047] [<ffffffff8107f
[ 1.938107] [<ffffffff8100a
[ 1.938168] [<ffffffff8107f
[ 1.938227] [<ffffffff8100a
[ 1.938286] Code: 75 29 44 8b 46 20 45 85 c0 75 24 48 63 ff 48 8b 06 48 89 d6 48 03 04 fd a0 f2 ac 81 48 89 c7 e8 1e ff ff ff b8 01 00 00 00 c9 c3 <0f> 0b eb fe 8b 3d c5 4a a5 00 eb d4 eb 09 90 90 90 90 90 90 90
[ 1.939990] RIP [<ffffffff8107a
[ 1.940075] RSP <ffff880152ec5d50>
[ 1.940176] ---[ end trace b7caf1fb48b24338 ]---
Any suggestions? Thanks in advance.
Omar