Kernel Bug ( $uname -a Linux cinema 2.6.24-23-generic #1 SMP Mon Jan 26 00:13:11 UTC 2009 i686 GNU/Linux ) Dalam Ubuntu Hardy 8.10 pada ACPI biasanya mengakibatkan hard disk melakuan SoftReset. Pesan yang menyepam pada log message kita kurang lebih seperti dibawah ini :

"Mar 19 18:58:17 cinema kernel: [10400.706905] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Mar 19 18:58:17 cinema kernel: [10400.706918] ata1.00: cmd c8/00:08:04:5d:a2/00:00:00:00:00/e2 tag 0 dma 4096 in
Mar 19 18:58:17 cinema kernel: [10400.706922] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
Mar 19 18:58:17 cinema kernel: [10400.706928] ata1.00: status: { DRDY }
Mar 19 18:58:17 cinema kernel: [10400.706944] ata1: soft resetting link
Mar 19 18:58:17 cinema kernel: [10400.953770] ata1.00: configured for UDMA/133
Mar 19 18:58:17 cinema kernel: [10400.953787] ata1: EH complete
Mar 19 18:58:17 cinema kernel: [10400.969147] sd 0:0:0:0: [sda] 625142448 512-byte hardware sectors (320073 MB)
Mar 19 18:58:17 cinema kernel: [10400.969573] sd 0:0:0:0: [sda] Write Protect is off
Mar 19 18:58:17 cinema kernel: [10400.969577] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
Mar 19 18:58:17 cinema kernel: [10400.970566] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DP
O or FUA"

dan Juga

"Mar 19 20:48:22 cinema kernel: [16987.479903] ACPI Error (psargs-0355): [\_TZ_.THRM] Namespace lookup failure, AE_NOT_FOUND
Mar 19 20:48:22 cinema kernel: [16987.479930] ACPI Error (psparse-0537): Method parse/execution failed [\_GPE._L1C] (Node f7c
49450), AE_NOT_FOUND
Mar 19 20:48:22 cinema kernel: [16987.479973] ACPI Exception (evgpe-0576): AE_NOT_FOUND, while evaluating GPE method [_L1C] [
20070126]
Mar 19 20:56:42 cinema kernel: [17486.160294] ACPI Error (psargs-0355): [\_TZ_.THRM] Namespace lookup failure, AE_NOT_FOUND
Mar 19 20:56:42 cinema kernel: [17486.160305] ACPI Error (psparse-0537): Method parse/execution failed [\_GPE._L1C] (Node f7c
49450), AE_NOT_FOUND
Mar 19 20:56:42 cinema kernel: [17486.160336] ACPI Exception (evgpe-0576): AE_NOT_FOUND, while evaluating GPE method [_L1C] [
20070126]
Mar 19 21:44:08 cinema kernel: [20323.359768] ACPI Error (psargs-0355): [\_TZ_.THRM] Namespace lookup failure, AE_NOT_FOUND
Mar 19 21:44:08 cinema kernel: [20323.359786] ACPI Error (psparse-0537): Method parse/execution failed [\_GPE._L1C] (Node f7c
49450), AE_NOT_FOUND
Mar 19 21:44:08 cinema kernel: [20323.359829] ACPI Exception (evgpe-0576): AE_NOT_FOUND, while evaluating GPE method [_L1C] [
20070126]
Mar 19 21:45:13 cinema kernel: [20388.468259] ACPI Error (psargs-0355): [\_TZ_.THRM] Namespace lookup failure, AE_NOT_FOUND
Mar 19 21:45:13 cinema kernel: [20388.468272] ACPI Error (psparse-0537): Method parse/execution failed [\_GPE._L1C] (Node f7c
49450), AE_NOT_FOUND
Mar 19 21:45:13 cinema kernel: [20388.468315] ACPI Exception (evgpe-0576): AE_NOT_FOUND, while evaluating GPE method [_L1C] [
20070126]
Mar 19 21:58:07 cinema kernel: [21160.412952] ACPI Error (psargs-0355): [\_TZ_.THRM] Namespace lookup failure, AE_NOT_FOUND
Mar 19 21:58:07 cinema kernel: [21160.412966] ACPI Error (psparse-0537): Method parse/execution failed [\_GPE._L1C] (Node f7c
49450), AE_NOT_FOUND
Mar 19 21:58:07 cinema kernel: [21160.413008] ACPI Exception (evgpe-0576): AE_NOT_FOUND, while evaluating GPE method [_L1C] [
20070126]
Mar 19 21:59:28 cinema kernel: [21241.303830] ACPI Error (psargs-0355): [\_TZ_.THRM] Namespace lookup failure, AE_NOT_FOUND
Mar 19 21:59:28 cinema kernel: [21241.303844] ACPI Error (psparse-0537): Method parse/execution failed [\_GPE._L1C] (Node f7c
49450), AE_NOT_FOUND
Mar 19 21:59:28 cinema kernel: [21241.303888] ACPI Exception (evgpe-0576): AE_NOT_FOUND, while evaluating GPE method [_L1C] [
20070126]
Mar 19 22:01:33 cinema kernel: [21366.099370] ACPI Error (psargs-0355): [\_TZ_.THRM] Namespace lookup failure, AE_NOT_FOUND
Mar 19 22:01:33 cinema kernel: [21366.099384] ACPI Error (psparse-0537): Method parse/execution failed [\_GPE._L1C] (Node f7c
49450), AE_NOT_FOUND
Mar 19 22:01:33 cinema kernel: [21366.099427] ACPI Exception (evgpe-0576): AE_NOT_FOUND, while evaluating GPE method [_L1C] [
20070126]"

Hal ini akan membuat system kita lambat bahkan sampai Freeze.

Untuk mengatasi masalah tersebut bisa kita tambahkan options :
"options libata noacpi=1"
pada file
/etc/modrobe.d/options

Refrensi diambil dari :
https://launchpad.net/bugs/202767