[Bug 43655] Latest radeon dri driver on HD6950 with kernel 3.2 flickers

[bugzilla-daemon at freedesktop.org]

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

--- Comment #8 from Alexandre Demers <alexandre.f.demers at gmail.com> 2011-12-15 17:50:38 PST ---
I think I've found a hint. Here's the thing:

Whatever kernel version is the first entry in my Grub's list, the problem will
appear. If I select a different kernel manually or if I change the default menu
entry to a different one, everything is fine. The only exception is if my first
menu entry is Windows. Then, there is never any problem.

Here is what I see when selecting the first entry. First, the Grub's background
stays for a moment and then it switches to the boot screen (using Ubuntu, it
shows the Ubuntu loading screen). However, most of the time, it will flicker,
usually showing only a couple of clear lines at the top of the screen.

If I select another entry, it switches to the kernel initialization (showing
step by step what is being done) and then it switches to the boot screen only
after having initialized correctly the screen. The only difference I can see
between the first entries and the others is the following in my grub.cfg:
    set gfxpayload=$linux_gfx_mode

I suspect a bad interaction between Grub and the rest of the initialization
process. Does my suspicion make sense?

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