[Bug 43655] Latest radeon dri driver on HD6950 with GRUB set gfxpayload=$linux_gfx_mode put the display in a flickering state

Sat Jul 21 03:49:15 PDT 2012

https://bugs.freedesktop.org/show_bug.cgi?id=43655

--- Comment #13 from Alexandre Demers <alexandre.f.demers at gmail.com> 2012-07-21 03:49:15 PDT ---
It's been some time now. Since my initial report, I moved from Ubuntu to Arch.
Today, it was officially announced Arch was moving to Grub2. So I updated my
setup (I was using Grub legacy since my move to Arch). Suprise, this bug is
still valide.

So I played around with grub default options. So GRUB_GFXMODE=auto works fine,
but GRUB_GFXPAYLOAD_LINUX=keep triggers the bug. Removing the latest option
makes everything runs smoothly.

I read bug 49262 and two things are common with my setup: we are both using a
69XX radeon card and we are both using a DVI-to-VGA adaptor. I'm wondering if
the combination of card AND adaptor was the root of the problem. Before having
this 6950 card, I was using an Radeon HD 3200 IGP without any adaptor and I had
no problem.

I don't have any other monitor here and I don't have a DVI or HDMI input on my
monitor, so I can't tell yet. But still, what would you suggest to try to help
figure out what's going on? Any comment from Alex or Michel would be
appreciated. I could have access to a different monitor if I ask for it.

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