[Bug 67889] [Baytrail-M] Blackscreen occurred after running xrandr setting twice

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67889

--- Comment #6 from shui yangwei <yangweix.shui at intel.com> ---
(In reply to comment #5)
> How much memory do you have on your byt-m? I have 2GiB, and using a
> 19200x10800 I hit an allocation failure when downsampling to the scanout,
> hence fill the output with black.

Our machine use mode 16800x10500:
----------------------
VGA1 connected 16800x10500+0+0 (normal left inverted right x axis y axis) 474mm
x 296mm
   1680x1050      60.0*+
   1280x1024      75.0     60.0
   1152x864       75.0
   1024x768       75.1     60.0


machine boot up memory info:
-----------------------
[root at x-byt04 ~]# cat /proc/meminfo
MemTotal:        1910716 kB
MemFree:         1686332 kB
Buffers:           25112 kB
Cached:           116548 kB



The memory of our byt-m is also 2GiB.
After running one time "xrandr --output VGA1 --scale 10x10":
-----------------------
[root at x-byt04 ~]# cat /proc/meminfo
MemTotal:        1910716 kB
MemFree:          974536 kB
Buffers:           25180 kB
Cached:           820776 kB
.....
.....

running "xrandr --output VGA1 --scale 10x10" for the second time, meminfo have
no changes.

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