Re: Oopses and ACPI problems (Linus 2.6.29-rc4)

Darren Salt
2009-02-10T19:52:10Z

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I demand that Corentin Chary may or may not have written...

> On Tue, Feb 10, 2009 at 4:45 PM, Matthew Garrett <mjg59@srcf.ucam.org>
> wrote:
[snip; long delay when initialising eeepc-laptop]
>>>> BIOS bug. There's an explicit delay in the eee bios for some reason, and
>>>> I haven't found any straightforward way to avoid it.
>>> BIOS bug or no, the fact remains that this is (AFAICS) a regression.
>> You don't get properly working hotkeys otherwise, to the best of my
>> recollection. There's an entry on the kernel bugzilla about this
>> somewhere.

> http://bugzilla.kernel.org/show_bug.cgi?id=12243
> If I understand things correctly, this was already the case before, but the
> kernel boot was slower, so we couldn't see that. If it's not the case,
> someone with a 901 should try bisecting (I only have a 701).

I have some timings...

>From 2.6.28.4:
[ 0.898903] eeepc: Eee PC Hotkey Driver
[ 0.902414] eeepc: Hotkey init (getting ACPI bus status)
[ 0.905913] eeepc: Hotkey init (init flags)
[ 2.620193] eeepc: Hotkey init flags 0x41
[ 2.626667] eeepc: Get control methods supported: 0x101713
[ 2.630215] input: Asus EeePC extra buttons as /class/input/input4

>From 2.6.29-rc4:

[ 2.141971] eeepc: Eee PC Hotkey Driver
[ 2.145325] eeepc: Hotkey init (getting ACPI bus status)
[ 2.148555] eeepc: Hotkey init (init flags)
[ 2.286445] usb 5-1: new full speed USB device using uhci_hcd and address 2
[... USB Bluetooth device; Elantech test ...]
[ 2.780187] input: ETPS/2 Elantech Touchpad as /class/input/input5
[ 28.088399] eeepc: Hotkey init flags 0x41
[ 28.094880] eeepc: Get control methods supported: 0x101713
[ 28.098425] input: Asus EeePC extra buttons as /class/input/input6

Config is as in my first posting in this thread; kernel logs are attached.
The following patch is applied:

--- ./drivers/platform/x86/eeepc-laptop.c~ 2009-02-10 16:40:18.000000000 +0000
+++ ./drivers/platform/x86/eeepc-laptop.c 2009-02-10 16:40:18.000000000 +0000
@@ -452,10 +452,15 @@
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
int result;

+ printk(EEEPC_NOTICE "Hotkey init (getting ACPI bus status)\n");
result = acpi_bus_get_status(ehotk->device);
if (result)
+ {
+ printk(EEEPC_ERR "Hotkey init aborted (%d)\n", result);
return result;
+ }
if (ehotk->device->status.present) {
+ printk(EEEPC_NOTICE "Hotkey init (init flags)\n");
if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
&buffer)) {
printk(EEEPC_ERR "Hotkey initialization failed\n");

--
| Darren Salt | linux or ds at | nr. Ashington, | Toon
| RISC OS, Linux | youmustbejoking,demon,co,uk | Northumberland | Army
| + Buy less and make it last longer. INDUSTRY CAUSES GLOBAL WARMING.

If at first you don't succeed, give up. No use being a damn fool.

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