Bug#627568: [xserver-xorg-video-nouveau] Dual head problem: Flicker on 2nd monitor using GeForce 8500 GT
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On 22/05/11 07:06, Sven Joachim wrote:
>> I had to add a modeline as the EEID is not detected properly on the 2nd
>> monitor (DVI-I-1)
>
> I think this is the reason for the flickering. Do you also see it if
> you connect only the DVI monitor?
>
Yes, if the primary monitor is disconnected, leaving only the 2nd one
the blinking was still present.
The 2nd monitor is a fairly old IIyama Vision Master Pro 452. It always
used to be a bit funny with the old nv driver, although I have to say,
the Nvidia proprietary driver never gave a problem with this old monitor.
On the other hand, using xrandr is much more configurable and sensible
than Nvidia's silly "twinview" setup. ;-)
Removing the Nvidia proprietary driver has left my system completely
free of non-free and contrib packages!
> Try booting with drm_kms_helper.poll=0 kernel parameter.
That does it! Well done: No more flicker!
In case any readers are not familiar with grub2 I edited:
/etc/default/grub
thus:
GRUB_CMDLINE_LINUX_DEFAULT="quiet drm_kms_helper.poll=0"
and ran (as root)
update-grub2
then rebooted.
Thanks Sven.
- --
Guy
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