On Thu, 12 May 2011 00:25:34 +0200 "Rafael J. Wysocki" <rjw@xxxxxxx> wrote: > There seems to be a problem on my Acer box which is related to DIPM > and switching the power source. Namely, when I detach the AC adapter > from the machine, the disk (which is an Intel SSD) freezes for a > while and something like this appears in dmesg: [...] Since updating to 2.6.39-rc7 (from 2.6.38.x) I have similar problems with two notebooks using Intel ICH: Acer PTZ1825 00:1f.2 SATA controller: Intel Corporation ICH9M/M-E SATA AHCI Controller (rev 03) (prog-if 01 [AHCI 1.0]) Subsystem: Acer Incorporated [ALI] Device 0300 Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 42 I/O ports at 30e8 [size=8] I/O ports at 30fc [size=4] I/O ports at 30e0 [size=8] I/O ports at 30f8 [size=4] I/O ports at 3020 [size=32] Memory at d4504000 (32-bit, non-prefetchable) [size=2K] Capabilities: [80] MSI: Enable+ Count=1/16 Maskable- 64bit- Capabilities: [70] Power Management version 3 Capabilities: [a8] SATA HBA v1.0 Capabilities: [b0] PCI Advanced Features Kernel driver in use: ahci Dell Latitude E6510 00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Cont roller (rev 05) (prog-if 01 [AHCI 1.0]) Subsystem: Dell Device 040b Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 41 I/O ports at 8090 [size=8] I/O ports at 8080 [size=4] I/O ports at 8070 [size=8] I/O ports at 8060 [size=4] I/O ports at 8020 [size=32] Memory at e9640000 (32-bit, non-prefetchable) [size=2K] Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [70] Power Management version 3 Capabilities: [a8] SATA HBA v1.0 Capabilities: [b0] PCI Advanced Features Kernel driver in use: ahci Patch not tried yet (do not know / not looked into yet where to change for this chipset). Seems to be a 2.6.39-rcX regression? -- MfG, Michael Leun -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html