VBIOS can't switch to external device when I use xf86-video-ati driver

[Jhih-Sin Chen]

On Thu, Jun 26, 2008 at 10:37 PM, Jhih-Sin Chen <jschen.cse at gmail.com> wrote:
> On 6/26/08, Alex Deucher <alexdeucher at gmail.com> wrote:
>> On Thu, Jun 26, 2008 at 2:58 AM, Jhih-Sin Chen <jschen.cse at gmail.com> wrote:
>> > On 6/25/08, Alex Deucher <alexdeucher at gmail.com> wrote:
>> >> On Wed, Jun 25, 2008 at 10:50 AM, Jhih-Sin Chen <jschen.cse at gmail.com> wrote:
>> >> > On Wed, Jun 25, 2008 at 10:26 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
>> >> >> On Wed, Jun 25, 2008 at 9:56 AM, Jhih-Sin Chen <jschen.cse at gmail.com> wrote:
>> >> >>> Hi,
>> >> >>>
>> >> >>> I am using Radeon HD 3470 card with xf86-video-ati 6.8.192 on my laptop.
>> >> >>> I try to implement hotkey function to switch display device.
>> >> >>> I have set _DOS parameter in ACPI and ask VBIOS to switch display
>> >> >>> device but it fails.
>> >> >>>
>> >> >>> However, the hotkey function can switch display device successfully
>> >> >>> when I use "vesa" driver.
>> >> >>> Do you have any suggetion on this issue? Thanks.
>> >> >>
>> >> >> It's disabled on purpose.  The bios goes behind the driver's back and
>> >> >> messes with the hardware which can lead to bad state or possibly hw
>> >> >> locks.  You can control the outputs with xrandr so please use that.
>> >> >> On most laptops you can even change the video hotkey to produce acpi
>> >> >> events rather than banging the hw directly and then you tie that event
>> >> >> to a script that runs xrandr commands.
>> >> >>
>> >> >> Alex
>> >> >>
>> >> >
>> >> > Hi,
>> >> >
>> >> > But I can't use xrandr to swtich display device to HDMI. Is it a
>> >> > limitation of xrandr or anything wrong?
>> >> >
>> >>
>> >> what sort of problem are you having?
>> >> xrandr --output HDMI-0 --auto
>> >> should do the trick.
>> >>
>> >> What does the output of xrandr look like?
>> >
>> > "xrandr -q" always show "hdmi-0 disconnected" even if my laptop
>> > connect to HDMI device.
>> > "xrandr --output HDMI-0 --auto" show nothing and can't switch to HDMI.
>> >
>> > Where is the start point to debug this issue? Thank you.
>> >
>>
>> We'd need to see your log.  Can you post your xorg log and config?
>>
>> In the meantime you can force the output on with xrandr using something like:
>>

Hi,
I use the following method to switch HDMI but it still fails.
my xorg log  http://140.117.176.25/~hsing/Xorg.0.log
my xorg.conf http://140.117.176.25/~hsing/xorg.conf
Thanks.
>
>> xrandr --newmode "1024x768R"   56.00  1024 1072 1104 1184  768 771 775
>> 790 +hsync -vsync
>> xrandr --addmode HDMI-0 "1024x768R"
>> xrandr --output HDMI-0 --mode "1024x768R"
>>
>> Replace the 1024x768 mode with whatever mode you want to use on your HDMI port.
>> you can generate the modeline with cvt:
>> cvt -r 1024 768 60
>> or (non-reduced blanking modes):
>> cvt 1024 768 60
>>
>> Thanks,
>>
>> Alex
>>
>