Hi Alberto,
well a frame rate of 24Hz is perfectly reasonable for a TV and desktop
usage.
This is probably caused by the TVs limited HDMI bandwidth and a refresh
rate of 30/25 Hz for the interlaced mode isn't much better either.
Regards,
Christian.
Am 30.03.21 um 22:59 schrieb Alberto Salvia Novella:
The frame-rate at 24Hz is extremely poor for normal desktop usage.
If the highest resolution, aka 1080p, uses that refresh rate then the
desktop will default to that frame-rate.
Other progressive modes don't exhibit any issue.
On Tue, 30 Mar 2021 at 18:26, Christian König
<[email protected] <mailto:[email protected]>> wrote:
Hi Alberto,
I think the driver should only support resolutions that are
*progressive*, but also at least of *50Hz*.
Why do you think so?, the 24Hz resolution seems to be the native
one of the display.
Regards,
Christian.
Am 30.03.21 um 17:37 schrieb Alberto Salvia Novella:
This is why I'm using interlaced:
$ *xrandr*
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected primary 1920x1080+0+0 (normal left inverted
right x axis y axis) 16mm x 9mm
1920x*1080i* 60.00*+ 50.00 59.94
1920x1080 *24.00* 23.98
1280x*720* 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
DVI-0 disconnected (normal left inverted right x axis y axis)
I think the driver should only support resolutions that are
*progressive*, but also at least of *50Hz*.
On Tue, 30 Mar 2021 at 15:41, Christian König
<[email protected]
<mailto:[email protected]>> wrote:
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
<[email protected] <mailto:[email protected]>>
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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