[openchrome-devel] [Bug 107412] HPmini 2133 wrong resolution on openchrome v0.6 (1024x768 instead of 1024x600)

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Jan 15 22:28:39 UTC 2019


--- Comment #19 from Kevin Brace <kevinbrace at gmx.com> ---
It appears that you are seeing false detection of a VGA connector.
This feature was added during the OpenChrome DDX Version 0.7 development cycle,
but it is proving to be less than reliable with some models, particularly newer
single chip Chrome IGP (i.e., CX700 / VX700, VX800, VX855, and VX900)
In practice, it affects several models other than the single chip Chrome IGP.
I have observed false detection with Neoware m100 
I was thinking of disabling the code, and only use I2C bus based detection for
a VGA connector.
The only drawback to this is that it will not be able to support a VGA
connector with its I2C being broken (it happens with some people) or a really,
really old VGA monitor without I2C bus support (i.e., from late '80s to early
In the interest of making the device driver work for more users, I will take
out the VGA connector detection code.

(In reply to xanum from comment #16)
> Created attachment 143115 [details]
> Xorg Log from patched openchrome 0.6.181
> I have compiled the 0.6.181 driver with your patch in my 1024x600 hp mini
> and installed using 'make install'
> After the reboot, the screen resolution is correctly set to 1024x600, no
> flicker or any other visible problem. Also the standby resume works OK. I'm
> attaching the Xorg log.
> But I see the following problem with the bottom panel: 
> I'm using LXDE with xdm for the login page, also I have a task bar of 50
> pixels high with transparency over a standard LXDE wallpaper. After the
> login page, the taskbar is rendered correctly, but after a few seconds, the
> task bar flickers and the wallpaper seems out of sync in the 24 last pixel
> rows of the screen. Also if I log out and return to the login screen, is
> rendered in a 1024x576 screen and the last 24 pixel rows remain with the
> LXDE wallpaper. In the next attachements I show screenshots with the normal
> screen and the unusual one.
> From reviewing the Xorg Log, I see that the VGA output is detected as
> connected and is set to a 1024x576 (exactly the 24 pixel rows that are the
> problem). I don't have any monitor connected to the VGA output. Could be
> this the problem?
> Best regards

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