Bug#884953: vlc: bad window redraw: black lines

Vincent Lefevre vincent at vinc17.net
Mon Jan 8 15:20:41 UTC 2018

Control: retitle -1 nvidia-driver: bad VLC window redraw with HiDPI screen: black lines
Control: tags -1 - moreinfo
Control: found -1 384.98-3
Control: found -1 384.111-1
Control: forwarded -1 https://devtalk.nvidia.com/default/topic/1028412/linux/bad-vlc-window-redraw-with-hidpi-screen-black-lines/

On 2018-01-07 02:32:50 +0100, Vincent Lefevre wrote:
> On 2018-01-04 23:37:33 +0000, Luca Boccassi wrote:
> > I would recommend reporting this upstream:
> > 
> > https://devtalk.nvidia.com/default/board/98/linux/
> > or
> > linux-bugs at nvidia.com
> First I'll try on two other of my machines (having a very similar end
> user config) on Monday or in the next few days to possibly have more
> information about the bug.

On another machine, with also nvidia-driver, I could not reproduce
the bug. The main difference is that its screen is not HiDPI. So,
I've tried with:


and the bug appeared!

On a third machine, with the nouveau driver, I could not reproduce
the bug at all (whether QT_SCALE_FACTOR=2 is used or not).

I've reported the bug upstream:


Vincent Lefèvre <vincent at vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)

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