[Libdlo] Here's the error report, and another question...

Thu Dec 17 21:09:09 PST 2009

By the way --

I've been using that page as a crutch. Seriously -- it was all that I knew 
up until a couple of days ago, when I finally signed up for the list. But 
the other thing is that I have noticed how everyone seems to be complaining 
about 9.10. That should have rolled more stuff into the distro, and yet it 
seems to have made matters worse. But I can't use the 9.04 distro, because I 
have a modern computer -- and the older distros all expect to see CD drives 
as IDE drives -- not SATA.

The final lingering thought that I have has to do with the displaylink 03 
mod. I'm still having a dickens of a time figuring out why I get all of 
those errors. If you can patiently explain why that happens, it would be 
great. Unless, of course, you don't know either -- and this is always 
possible...

:)

Thanks again for all of your help. I'll continue hacking away.

- James

James "Sammy James" Middleton
JSM Instruments
130 South Front Street
Suite 204
Memphis, TN 38103
901-433-9998
603-305-6083

http://www.sammyjames.com
----- Original Message ----- 
From: "Bernie Thompson" <bernie at berniethompson.com>
To: "James" <sammy at sammyjames.com>
Cc: <libdlo at lists.freedesktop.org>
Sent: Thursday, December 17, 2009 10:54 PM
Subject: Re: [Libdlo] Here's the error report, and another question...

Hi James,

No, getting the kernel driver running won't get a display going. It
can still be a frustrating process from there.

Getting any non-PCI display working on Linux right now requires a
custom xorg.conf, and other tricks to avoid conflicts with PCI
graphics controllers in the system, and it can get quite complicated
(even once you have a kernel framebuffer driver running).  And there's
lots of kernel/X/GDM version-dependent incompatibilities.

See http://libdlo.freedesktop.org/wiki/HowTo for the smattering of
experience reports and instructions on specific distros.

This will only get easy once USB display support is baked right into
the distros.

Bernie

On Thu, Dec 17, 2009 at 6:35 PM, James <sammy at sammyjames.com> wrote:
> Bernie:
>
> Okay -- so, when I do all of this, I should be able to use the display --
>
> right...?!
>
> :D
>
> Thank you. I'll let you know what happens.
>
> James
>
>
> James "Sammy James" Middleton
> JSM Instruments
> 130 South Front Street
> Suite 204
> Memphis, TN 38103
> 901-433-9998
> 603-305-6083
>
> http://www.sammyjames.com
> ----- Original Message ----- From: "Bernie Thompson"
> <bernie at berniethompson.com>
> To: "James" <sammy at sammyjames.com>
> Cc: <libdlo at lists.freedesktop.org>
> Sent: Thursday, December 17, 2009 7:03 PM
> Subject: Re: [Libdlo] Here's the error report, and another question...
>
>
> Hi James,
>
> To blacklist a module, in addition to adding a line to one of the
> /etc/modprobe.d/ conf files, you also have to do "sudo depmod -a &&
> update-initramfs -u" (like the instructions at
> http://libdlo.freedesktop.org/wiki/TextConsole).
>
> For the displaylink-mod compile errors - I assume it's related to the
> edid.h header being not found (or perhaps included several times under
> different names). Likely something simple. But there's no need for
> that - the edid parsing can be implemented with pure fb library
> functions.
>
> If you "git clone http://git.plugable.com/webdav/udlfb" and "git
> checkout better-rle", you'll get a recent version off of udlfb that
> has a bunch of in-progress improvements, including fairly complete
> support for using the fb library functinons for edid parsing. Should
> compile clean on 9.10, but haven't tested. Note: this driver is
> called udlfb, so you'll want to replace the udlfb in 9.10, not
> blacklist, to run this. It supports the same X server as
> displaylink-mod. See
> http://git.plugable.com/gitphp/index.php?p=udlfb&a=shortlog&h=refs/heads/better-rle
> for changes in it. Hoping the changes there will grow up to be an
> acceptable patch set some day.
>
> Best wishes,
> Bernie
>
> On Thu, Dec 17, 2009 at 12:19 PM, James <sammy at sammyjames.com> wrote:
>>
>> Hi Bernie:
>>
>> make -C /lib/modules/`uname -r`/build SUBDIRS=/home/sammy/dl modules
>> make[1]: Entering directory `/usr/src/linux-headers-2.6.31-9-rt'
>> CC [M] /home/sammy/dl/displaylink-usb.o
>> /home/sammy/dl/displaylink-usb.c:70: error: conflicting types for
>> ‘displaylink_edid_to_reg’
>> /home/sammy/dl/displaylink-usb.c:30: note: previous definition of
>> ‘displaylink_edid_to_reg’ was here
>> /home/sammy/dl/displaylink-usb.c: In function ‘displaylink_edid_to_reg’:
>> /home/sammy/dl/displaylink-usb.c:85: error: ‘struct detailed_pixel_timing’
>> has no member named ‘hactive_hi’
>> /home/sammy/dl/displaylink-usb.c:91: error: ‘struct detailed_pixel_timing’
>> has no member named ‘vactive_hi’
>> /home/sammy/dl/displaylink-usb.c:97: error: ‘struct detailed_pixel_timing’
>> has no member named ‘hblank_hi’
>> /home/sammy/dl/displaylink-usb.c:97: error: ‘struct detailed_pixel_timing’
>> has no member named ‘hsync_offset_hi’
>> /home/sammy/dl/displaylink-usb.c:101: error: ‘struct
>> detailed_pixel_timing’
>> has no member named ‘vblank_hi’
>> /home/sammy/dl/displaylink-usb.c:101: error: ‘struct
>> detailed_pixel_timing’
>> has no member named ‘vsync_offset_hi’
>> /home/sammy/dl/displaylink-usb.c:101: error: ‘struct
>> detailed_pixel_timing’
>> has no member named ‘vsync_offset_lo’
>> /home/sammy/dl/displaylink-usb.c:105: error: ‘struct
>> detailed_pixel_timing’
>> has no member named ‘hblank_hi’
>> /home/sammy/dl/displaylink-usb.c:106: error: ‘struct
>> detailed_pixel_timing’
>> has no member named ‘hsync_pulse_width_hi’
>> /home/sammy/dl/displaylink-usb.c:109: error: ‘struct
>> detailed_pixel_timing’
>> has no member named ‘vblank_hi’
>> /home/sammy/dl/displaylink-usb.c:110: error: ‘struct
>> detailed_pixel_timing’
>> has no member named ‘vsync_pulse_width_hi’
>> /home/sammy/dl/displaylink-usb.c:110: error: ‘struct
>> detailed_pixel_timing’
>> has no member named ‘vsync_pulse_width_lo’
>> /home/sammy/dl/displaylink-usb.c: In function
>> ‘displaylink_set_video_mode’:
>> /home/sammy/dl/displaylink-usb.c:230: warning: passing argument 1 of
>> ‘displaylink_edid’ from incompatible pointer type
>> /home/sammy/dl/displaylink.h:121: note: expected ‘struct displaylink_dev
>> *’
>> but argument is of type ‘struct detailed_timing *’
>> /home/sammy/dl/displaylink-usb.c:230: error: too many arguments to
>> function
>> ‘displaylink_edid’
>> /home/sammy/dl/displaylink-usb.c:230: error: void value not ignored as it
>> ought to be
>> /home/sammy/dl/displaylink-usb.c:249: error: ‘struct
>> detailed_pixel_timing’
>> has no member named ‘hactive_hi’
>> /home/sammy/dl/displaylink-usb.c: In function ‘displaylink_setup’:
>> /home/sammy/dl/displaylink-usb.c:308: error: ‘struct
>> detailed_pixel_timing’
>> has no member named ‘hactive_hi’
>> /home/sammy/dl/displaylink-usb.c:311: error: ‘struct
>> detailed_pixel_timing’
>> has no member named ‘hactive_hi’
>> /home/sammy/dl/displaylink-usb.c:312: error: ‘struct
>> detailed_pixel_timing’
>> has no member named ‘vactive_hi’
>> make[2]: *** [/home/sammy/dl/displaylink-usb.o] Error 1
>> make[1]: *** [_module_/home/sammy/dl] Error 2
>> make[1]: Leaving directory `/usr/src/linux-headers-2.6.31-9-rt'
>> make: *** [all] Error 2
>>
>>
>> Okay -- first, I know that this particular error set has been discussed
>> elsewhere. But hey -- the more the merrier, right?!
>>
>> :)
>>
>> I added the "blacklist udlfb" to blacklist.conf under modprobe.d. Let me
>> know if this was the correct file to add the line to.
>>
>> Also, another question: I'm using 9.10 UbuntuSTUDIO. The reason for my
>> using
>> this particular distro is that I need the realtime kernel, so that I can
>> run
>> Rosegarden and JackD. If there is a distro that uses an RT kernel, and
>> that
>> works better with DisplayLink, let me know. I really need both things to
>> work together.
>>
>> Thank you for your help.
>>
>> - Sammy
>>
>> James "Sammy James" Middleton
>> JSM Instruments
>> 130 South Front Street
>> Suite 204
>> Memphis, TN 38103
>> 901-433-9998
>> 603-305-6083
>>
>> http://www.sammyjames.com
>> _______________________________________________
>> Libdlo mailing list
>> Libdlo at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/libdlo
>>
>>
>
> 