On 08/03/12 23:39, 乔楚 wrote:
2012/8/3 Zack Breckenridge <[email protected]>:
First of all, let me note that the Kernel config file I posted was for
10.0-CURRENT (a few weeks back now though).
I've been looking into it, but still haven't developed a patch yet. I
have verified that the screen blanking issue, on my hardware, occurs
somewhere in the vm86 mode emulation code (which is how VESA is
implemented on amd64), ultimately called by vesa_bios_post(), which is
called in turn by vesa_load_state() on resume [see:
http://fxr.watson.org/fxr/source/dev/fb/vesa.c?im=3#L1497].
vesa_bios_post() ultimately calls x86bios_call() [see:
http://fxr.watson.org/fxr/source/compat/x86bios/x86bios.c?im=10#L584]
and emulates the real mode VESA "initialization" code with a call to
x86emu_exec_call().
I think in order to figure out whats going on from here I will have to
do some DDB scripting and capture the output. I don't believe remote
debugging will be possible with my hardware (no serial, no
firewire)... Anyway, I'm working on it.
So to verify that we are having the same issue, you can take the
following steps:
1) build a kernel with debugging and VESA enabled:
options VESA
options KDB
options DDB
2) disable X, boot into the console and issue the following commands:
# sysctl debug.acpi.suspend_bounce=1
# sysctl debug.kdb.enter=1
db> break x86emu_exec_call
db> c
# zzz
[you should hit the breakpoint]
db> bt
x86emu_exec_call() ...
vesa_bios_post() ...
... rest of backtrace ...
db> c
3) after hitting that last c, your screen should go black. Then you
should be able to type "reboot" and reboot cleanly
My screen go black, but type "reboot" no effect. I can be sure to type
"reboot" and return.
LED status:
1. Disk LED is light, and off at a moment.
2. "Z" LED is light, Battary and power LED is light.
3. Wifi LED is light.
I'm pretty sure that if you get the same results, we are having the
same issue, though I can make no guarantees.
When I shutdown from KDE, or type shutdown -p now from console, my
laptor can't shutdown complete.
The battary LED is light alawys, others LED is off, and vents of the
laptor has been blowing hot air.
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Honest Qiao: Regarding hot air, are you running powerd? Try "powerd -a
adaptive -b adaptive" as root and wait 5 minutes to see if the hot air
stops. If it works, try "man powerd" for installation instructions.
Lenovo laptops are thermally designed for low CPU utilization. I can
almost boil water on mine during buildworld. Without powerd, they run at
full thermal profile and act as excellent hand warmers.
Zack: Regarding remote debugging, do you have an expresscard/cardbus/etc
slot? Although hard to find you may be able to find a firewire card for
that. Not sure if that would work or not...same goes for a USB->Serial
console, my guess is that it wouldn't work?
Matt
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