Bug 62742 - Xvfb advertises unsupported fb configs
Summary: Xvfb advertises unsupported fb configs
Status: RESOLVED MOVED
Alias: None
Product: xorg
Classification: Unclassified
Component: Server/DDX/Xvfb (show other bugs)
Version: unspecified
Hardware: All Linux (All)
: medium normal
Assignee: Adam Jackson
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-03-25 21:19 UTC by Maik Riechert
Modified: 2018-12-13 18:31 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Attachments

Description Maik Riechert 2013-03-25 21:19:25 UTC 
When I start Xvfb with

Xvfb :1 -ac -screen 0 1024x768x16 &

and change DISPLAY to :1.0 then glxinfo says:

144 GLXFBConfigs:
    visual  x   bf lv rg d st  colorbuffer  sr ax dp st accumbuffer  ms  cav
  id dep cl sp  sz l  ci b ro  r  g  b  a F gb bf th cl  r  g  b  a ns b eat
----------------------------------------------------------------------------
0x03f  0 tc  0  32  0 r  . .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x040  0 tc  0  32  0 r  . .   8  8  8  8 .  .  0  0  0 16 16 16 16  0 0 Slow
0x041  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x042  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0  0  0 16 16 16 16  0 0 Slow
0x043  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x044  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0  0  0 16 16 16 16  0 0 Slow
0x045  0 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x046  0 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 Slow
0x047  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x048  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 Slow
0x049  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x04a  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 Slow
0x04b  0 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x04c  0 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 Slow
0x04d 32 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x04e  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 Slow
0x04f  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x050  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 Slow
0x051  0 tc  0  32  0 r  . .   8  8  8  8 .  .  0 32  0  0  0  0  0  0 0 None
0x052  0 tc  0  32  0 r  . .   8  8  8  8 .  .  0 32  0 16 16 16 16  0 0 Slow
0x053  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0 32  0  0  0  0  0  0 0 None
0x054  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0 32  0 16 16 16 16  0 0 Slow
0x055  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0 32  0  0  0  0  0  0 0 None
0x056  0 tc  0  32  0 r  y .   8  8  8  8 .  .  0 32  0 16 16 16 16  0 0 Slow
0x057  0 tc  0  24  0 r  . .   8  8  8  0 .  .  0  0  0  0  0  0  0  0 0 None
0x058  0 tc  0  24  0 r  . .   8  8  8  0 .  .  0  0  0 16 16 16  0  0 0 Slow
0x059  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0  0  0  0  0  0  0  0 0 None
0x05a  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0  0  0 16 16 16  0  0 0 Slow
0x05b  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0  0  0  0  0  0  0  0 0 None
0x05c  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0  0  0 16 16 16  0  0 0 Slow
0x05d  0 tc  0  24  0 r  . .   8  8  8  0 .  .  0 24  0  0  0  0  0  0 0 None
0x05e  0 tc  0  24  0 r  . .   8  8  8  0 .  .  0 24  0 16 16 16  0  0 0 Slow
0x05f  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0 24  0  0  0  0  0  0 0 None
0x060  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0 24  0 16 16 16  0  0 0 Slow
0x061  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0 24  0  0  0  0  0  0 0 None
0x062  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0 24  0 16 16 16  0  0 0 Slow
0x063  0 tc  0  24  0 r  . .   8  8  8  0 .  .  0 24  8  0  0  0  0  0 0 None
0x064  0 tc  0  24  0 r  . .   8  8  8  0 .  .  0 24  8 16 16 16  0  0 0 Slow
0x065  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0 24  8  0  0  0  0  0 0 None
0x066  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0 24  8 16 16 16  0  0 0 Slow
0x067  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0 24  8  0  0  0  0  0 0 None
0x068  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0 24  8 16 16 16  0  0 0 Slow
0x069  0 tc  0  24  0 r  . .   8  8  8  0 .  .  0 32  0  0  0  0  0  0 0 None
0x06a  0 tc  0  24  0 r  . .   8  8  8  0 .  .  0 32  0 16 16 16  0  0 0 Slow
0x06b  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0 32  0  0  0  0  0  0 0 None
0x06c  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0 32  0 16 16 16  0  0 0 Slow
0x06d  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0 32  0  0  0  0  0  0 0 None
0x06e  0 tc  0  24  0 r  y .   8  8  8  0 .  .  0 32  0 16 16 16  0  0 0 Slow
0x06f 16 tc  0  16  0 r  . .   5  6  5  0 .  .  0  0  0  0  0  0  0  0 0 None
0x070 16 tc  0  16  0 r  . .   5  6  5  0 .  .  0  0  0 16 16 16  0  0 0 Slow
0x071 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0  0  0  0  0  0  0  0 0 None
0x072 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0  0  0 16 16 16  0  0 0 Slow
0x073 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0  0  0  0  0  0  0  0 0 None
0x074 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0  0  0 16 16 16  0  0 0 Slow
0x075 16 tc  0  16  0 r  . .   5  6  5  0 .  .  0 24  0  0  0  0  0  0 0 None
0x076 16 tc  0  16  0 r  . .   5  6  5  0 .  .  0 24  0 16 16 16  0  0 0 Slow
0x077 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0 24  0  0  0  0  0  0 0 None
0x078 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0 24  0 16 16 16  0  0 0 Slow
0x079 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0 24  0  0  0  0  0  0 0 None
0x07a 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0 24  0 16 16 16  0  0 0 Slow
0x07b 16 tc  0  16  0 r  . .   5  6  5  0 .  .  0 24  8  0  0  0  0  0 0 None
0x07c 16 tc  0  16  0 r  . .   5  6  5  0 .  .  0 24  8 16 16 16  0  0 0 Slow
0x07d 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0 24  8  0  0  0  0  0 0 None
0x07e 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0 24  8 16 16 16  0  0 0 Slow
0x07f 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0 24  8  0  0  0  0  0 0 None
0x080 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0 24  8 16 16 16  0  0 0 Slow
0x081 16 tc  0  16  0 r  . .   5  6  5  0 .  .  0 32  0  0  0  0  0  0 0 None
0x082 16 tc  0  16  0 r  . .   5  6  5  0 .  .  0 32  0 16 16 16  0  0 0 Slow
0x083 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0 32  0  0  0  0  0  0 0 None
0x084 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0 32  0 16 16 16  0  0 0 Slow
0x085 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0 32  0  0  0  0  0  0 0 None
0x086 16 tc  0  16  0 r  y .   5  6  5  0 .  .  0 32  0 16 16 16  0  0 0 Slow
0x087  0 dc  0  32  0 r  . .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x088  0 dc  0  32  0 r  . .   8  8  8  8 .  .  0  0  0 16 16 16 16  0 0 Slow
0x089  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x08a  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0  0  0 16 16 16 16  0 0 Slow
0x08b  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x08c  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0  0  0 16 16 16 16  0 0 Slow
0x08d  0 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x08e  0 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 Slow
0x08f  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x090  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 Slow
0x091  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x092  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 Slow
0x093  0 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x094  0 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 Slow
0x095  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x096  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 Slow
0x097  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x098  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 Slow
0x099  0 dc  0  32  0 r  . .   8  8  8  8 .  .  0 32  0  0  0  0  0  0 0 None
0x09a  0 dc  0  32  0 r  . .   8  8  8  8 .  .  0 32  0 16 16 16 16  0 0 Slow
0x09b  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0 32  0  0  0  0  0  0 0 None
0x09c  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0 32  0 16 16 16 16  0 0 Slow
0x09d  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0 32  0  0  0  0  0  0 0 None
0x09e  0 dc  0  32  0 r  y .   8  8  8  8 .  .  0 32  0 16 16 16 16  0 0 Slow
0x09f  0 dc  0  24  0 r  . .   8  8  8  0 .  .  0  0  0  0  0  0  0  0 0 None
0x0a0  0 dc  0  24  0 r  . .   8  8  8  0 .  .  0  0  0 16 16 16  0  0 0 Slow
0x0a1  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0  0  0  0  0  0  0  0 0 None
0x0a2  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0  0  0 16 16 16  0  0 0 Slow
0x0a3  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0  0  0  0  0  0  0  0 0 None
0x0a4  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0  0  0 16 16 16  0  0 0 Slow
0x0a5  0 dc  0  24  0 r  . .   8  8  8  0 .  .  0 24  0  0  0  0  0  0 0 None
0x0a6  0 dc  0  24  0 r  . .   8  8  8  0 .  .  0 24  0 16 16 16  0  0 0 Slow
0x0a7  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0 24  0  0  0  0  0  0 0 None
0x0a8  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0 24  0 16 16 16  0  0 0 Slow
0x0a9  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0 24  0  0  0  0  0  0 0 None
0x0aa  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0 24  0 16 16 16  0  0 0 Slow
0x0ab  0 dc  0  24  0 r  . .   8  8  8  0 .  .  0 24  8  0  0  0  0  0 0 None
0x0ac  0 dc  0  24  0 r  . .   8  8  8  0 .  .  0 24  8 16 16 16  0  0 0 Slow
0x0ad  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0 24  8  0  0  0  0  0 0 None
0x0ae  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0 24  8 16 16 16  0  0 0 Slow
0x0af  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0 24  8  0  0  0  0  0 0 None
0x0b0  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0 24  8 16 16 16  0  0 0 Slow
0x0b1  0 dc  0  24  0 r  . .   8  8  8  0 .  .  0 32  0  0  0  0  0  0 0 None
0x0b2  0 dc  0  24  0 r  . .   8  8  8  0 .  .  0 32  0 16 16 16  0  0 0 Slow
0x0b3  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0 32  0  0  0  0  0  0 0 None
0x0b4  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0 32  0 16 16 16  0  0 0 Slow
0x0b5  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0 32  0  0  0  0  0  0 0 None
0x0b6  0 dc  0  24  0 r  y .   8  8  8  0 .  .  0 32  0 16 16 16  0  0 0 Slow
0x0b7 16 dc  0  16  0 r  . .   5  6  5  0 .  .  0  0  0  0  0  0  0  0 0 None
0x0b8 16 dc  0  16  0 r  . .   5  6  5  0 .  .  0  0  0 16 16 16  0  0 0 Slow
0x0b9 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0  0  0  0  0  0  0  0 0 None
0x0ba 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0  0  0 16 16 16  0  0 0 Slow
0x0bb 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0  0  0  0  0  0  0  0 0 None
0x0bc 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0  0  0 16 16 16  0  0 0 Slow
0x0bd 16 dc  0  16  0 r  . .   5  6  5  0 .  .  0 24  0  0  0  0  0  0 0 None
0x0be 16 dc  0  16  0 r  . .   5  6  5  0 .  .  0 24  0 16 16 16  0  0 0 Slow
0x0bf 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0 24  0  0  0  0  0  0 0 None
0x0c0 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0 24  0 16 16 16  0  0 0 Slow
0x0c1 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0 24  0  0  0  0  0  0 0 None
0x0c2 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0 24  0 16 16 16  0  0 0 Slow
0x0c3 16 dc  0  16  0 r  . .   5  6  5  0 .  .  0 24  8  0  0  0  0  0 0 None
0x0c4 16 dc  0  16  0 r  . .   5  6  5  0 .  .  0 24  8 16 16 16  0  0 0 Slow
0x0c5 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0 24  8  0  0  0  0  0 0 None
0x0c6 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0 24  8 16 16 16  0  0 0 Slow
0x0c7 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0 24  8  0  0  0  0  0 0 None
0x0c8 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0 24  8 16 16 16  0  0 0 Slow
0x0c9 16 dc  0  16  0 r  . .   5  6  5  0 .  .  0 32  0  0  0  0  0  0 0 None
0x0ca 16 dc  0  16  0 r  . .   5  6  5  0 .  .  0 32  0 16 16 16  0  0 0 Slow
0x0cb 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0 32  0  0  0  0  0  0 0 None
0x0cc 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0 32  0 16 16 16  0  0 0 Slow
0x0cd 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0 32  0  0  0  0  0  0 0 None
0x0ce 16 dc  0  16  0 r  y .   5  6  5  0 .  .  0 32  0 16 16 16  0  0 0 Slow

When I then run glxpbdemo from mesa-demos at http://cgit.freedesktop.org/mesa/demos/plain/src/xdemos/glxpbdemo.c it fails with:

$ ./glxpbdemo 100 100 x.ppm
Chose 0x69 as fbconfigid
failed to create drawable
Error: couldn't create pbuffer

When I run the same demo with Xvfb started with "-screen 0 1024x768x32" it works! It chooses 0x69 as well then.

What is wrong here? My guess is that fb config 0x69 is actually unsupported for 1024x768x16 but Xvfb advertises it anyway.

My version of xvfb is 2:1.11.4-0ubuntu10.1 according to dpkg -l *xvfb*.
Comment 1 Maik Riechert 2013-03-25 21:40:09 UTC 
I'm sorry, the argument that works is "-screen 0 1024x768x24", NOT "-screen 0 1024x768x32". With x32, I only get "Fatal server error: Couldn't add screen 0", but that's probably another bug.
Comment 2 James.Dutton 2017-06-09 18:01:34 UTC 
The problem is still present with 
My version of xvfb is 2:1.19.3-1ubuntu1 according to dpkg -l *xvfb*.
Comment 3 James.Dutton 2017-06-09 18:02:45 UTC 
I think the solution to this problem would be if Xvfb stopped advertising fbconfig's that do not work.
Comment 4 GitLab Migration User 2018-12-13 18:31:11 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/xorg/xserver/issues/192.

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