https://bugzilla.kernel.org/show_bug.cgi?id=56051
Summary: Loading ACPI video module causes freeze on T430 in
Discrete Graphics mode
Product: ACPI
Version: 2.5
Kernel Version: master
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Video
AssignedTo: acpi_power-vi...@kernel-bugs.osdl.org
ReportedBy: ke...@kevinlocke.name
Regression: No
Created an attachment (id=96771)
--> (https://bugzilla.kernel.org/attachment.cgi?id=96771)
acpidump in "Discrete Graphics" mode
On a Lenovo ThinkPad T430 with the latest BIOS (G1ET93WW - 2.53), when
configured to use the nVidia graphics card in the BIOS (by setting
"Graphics Device" to "Discrete Graphics"), modprobing the ACPI video
module causes the system to freeze hard either immediately or within a
few seconds. The video mode is not changed and the display is not
corrupted compared to the pre-modprobe state, the cursor continues to
blink, but the system ceases responding to input (SysRq does not work)
and no additional messages (except rarely the "ACPI: Video Device
[VID] [...]" messages when the freeze occurs a second or two later)
are produced to screen or netconsole.
This occurs on all kernel versions that I have tested, which includes
3.2 from the Debian archives, self-compiled 3.8.2, and self-compiled
linus master from earlier today (46a1f21a).
I have also confirmed that the system boots and functions correctly in
"Discrete Graphics" mode in Windows 7.
The freeze may or may not be related to the following messages (which
are not produced if the video module is loaded manually early in the
boot process - presumably because they are produced by the loading of
another module):
ACPI Warning: 0x0000000000000428-0x000000000000042f SystemIO conflicts with
Region \_SB_.PCI0.LPC_.PMIO 1 (20130117/utaddress-251)
ACPI: If an ACPI driver is available for this device, you should use it instead
of the native driver
ACPI Warning: 0x0000000000000530-0x000000000000053f SystemIO conflicts with
Region \_SB_.PCI0.LPC_.LPIO 1 (20130117/utaddress-251)
ACPI: If an ACPI driver is available for this device, you should use it instead
of the native driver
ACPI Warning: 0x0000000000000500-0x000000000000052f SystemIO conflicts with
Region \_SB_.PCI0.LPC_.LPIO 1 (20130117/utaddress-251)
ACPI: If an ACPI driver is available for this device, you should use it instead
of the native driver
lpc_ich: Resource conflict(s) found affecting gpio_ich
Also possibly relevant: acpidump produces the message "Wrong checksum for
FADT!" when run in either BIOS configuration.
I'll attach the acpidump, config, dmesg, /proc/iomem, /proc/ioports, and lspci
output to the report. Please let me know if there is anything else which I can
do to help troubleshoot/fix the issue.
Thanks for reading,
Kevin
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