http://bugzilla.kernel.org/show_bug.cgi?id=10884
Summary: CD/DVD drive not detected without acpi=off
Product: ACPI
Version: 2.5
KernelVersion: 2.6.25.5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Other
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
Latest working kernel version: none
Earliest failing kernel version: 2.6.25.5
Distribution: Debian
Hardware Environment: Zepto 6025WD laptop, Intel based
Software Environment: Debian Testing with kernel from kernel.org
Problem Description: The CD/DVD RW device is not detected at all by the kernel
if I boot it without any special options. I get an ACPI error, but the boot
continues and everything except the CD seems to work. The error is
ACPI Error (evregion-0316): No handler for Region [ERAM] (ffff81007f35e720)
[Emb
eddedControl] [20070126]
ACPI Error (exfldio-0289): Region EmbeddedControl(3) has no handler [20070126]
ACPI Error (psparse-0537): Method parse/execution failed
[\_SB_.PCI0.LPCB.EC0_._
REG] (Node ffff81007f35de10), AE_NOT_EXIST
ACPI: BIOS _OSI(Linux) query ignored
ACPI: DMI System Vendor: Zepto
ACPI: DMI Product Name: Znote
ACPI: DMI Product Version: 6025WD
ACPI: DMI Board Name: Znote
ACPI: DMI BIOS Vendor: Phoenix Technologies LTD
ACPI: DMI BIOS Date: 07/27/2007
ACPI: Please send DMI info above to [EMAIL PROTECTED]
ACPI: If "acpi_osi=Linux" works better, please notify
[EMAIL PROTECTED]
I tried acpi_osi=Linux, but it didn't make a difference. There was another
message that said
PCI: Using ACPI for IRQ routing
PCI: If a device doesn't work, try "pci=routeirq". If it helps, post a report
but that didn't help either.
However, if I boot with acpi=off the kernel does detect the CD device and it
seems to work OK. But then it doesn't detect the built-in SD card reader at
all.
Steps to reproduce:
1. Get Zepto 6025WD.
2. Install Linux 2.6.25.5.
3. Boot.
4. Try to access the CD/DVD RW device - there is none.
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