[Libdlo] displaylink-mod status for kernel 2.6.18

[Alexander Todorov]

Hello folks,
I've managed to compile and install displaylink-mod-0.3.tar.gz without issues
with kernel 2.6.18-164.6.1.el5. The driver loads but the attached monitor
doesn't turn green but shows garbage.

The relevant messages from /var/log/messages are:

Nov 12 22:58:28 multiseat kernel: DisplayLink device attached (DU2781)
Nov 12 22:58:29 multiseat kernel: found DisplayLink Chip unknown
Nov 12 22:58:29 multiseat kernel: sent encryption null key: 16
Nov 12 22:58:29 multiseat kernel: displaylink monitor info: W(1024) H(768)
clock(6500)
Nov 12 22:58:29 multiseat kernel: set video mode bulk message: 144 144
Nov 12 22:58:29 multiseat kernel: displaylink register flush: 0
Nov 12 22:58:29 multiseat kernel: non posso allocare il backing buffer
Nov 12 22:58:29 multiseat kernel: displaylink: probe of 1-2.1:1.0 failed with
error -12
Nov 12 22:58:29 multiseat kernel: usbcore: registered new driver displaylink
Nov 12 22:59:12 multiseat kernel: usbcore: deregistering driver displaylink

This is with RHEL5.4 on an Asus EeePC with Intel graphics:

00:02.0 VGA compatible controller: Intel Corporation Mobile 915GM/GMS/910GML
Express Graphics Controller (rev 04)
00:02.1 Display controller: Intel Corporation Mobile 915GM/GMS/910GML Express
Graphics Controller (rev 04)


Several questions:
1) How can I turn verbose output or enable debug mode so I can extract more info?

2) Is there a minimum kernel version for displaylink-mod or the other drivers?

3) Should I be testing with displayllink-mod or switch to udlfb 0.4.0 which is
proposed upstream as Bernie said? What are the plans for upstreaming/merging
other drivers?

Thanks,
Alexander.