Interlaced resolutions hang the desktop

[Christian König]

Mhm, no idea why an interlaced resolution would cause a crash. Maybe 
some miscalculation in the display code.

But apart from that if you just connected your PC to a TV I also 
wouldn't recommend using an interlaced resolution in the first place.

See those resolutions only exists for backward compatibility with analog 
hardware.

I think we would just disable those modes instead of searching for the bug.

Regards,
Christian.

Am 30.03.21 um 11:07 schrieb Alberto Salvia Novella:
> I guessed so.
>
> The GPU is a Radeon HD5870, and the screen is an old Telefunken TV 
> (TLFK22LEDPVR1).
>
> Since my real display got into repair I used this TV meanwhile, and to 
> my surprise it froze the system.
>
> On Tue, 30 Mar 2021 at 10:15, Christian König 
> <christian.koenig at amd.com <mailto:christian.koenig at amd.com>> wrote:
>
>     Hi Alberto,
>
>     well what hardware do you have?
>
>     Interlaced resolutions are not used any more on modern hardware,
>     so they
>     are not well tested.
>
>     Regards,
>     Christian.
>
>     Am 30.03.21 um 10:04 schrieb Alberto Salvia Novella:
>     > The entire desktop hangs after some minutes when using the module
>     > "radeon" with an interlaced resolution.
>     >
>     > Easier to trigger by playing a video on Firefox, at least on
>     kwin_x11.
>     > Wayland didn't exhibit the problem.
>     >
>     > Other display drivers, from different computers I have tried,
>     didn't
>     > allow those interlaced resolutions all together. It seems they know
>     > there will be problems.
>
>
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