Bug 764

Summary: [beagleboard] X server can not startup on beagleboard
Product: [Yocto Project Subprojects] Kernel Reporter: Yi Zhao <yi.zhao>
Component: kernel-toolingAssignee: Darren Hart <dvhart>
Status: VERIFIED FIXED QA Contact:
Severity: normal    
Priority: Medium CC: jiajun.xu, liang.li2, liangliang.wang, sgw, yi.zhao, yp.kernel.watcher, yp.watcher
Version: 1.0   
Target Milestone: 1.1   
Hardware: Beagleboard   
OS: arm   
Whiteboard: patches out for review (17-Jun-2011)
OS type for building Yocto: --- Type of Regression: ---
Verified: Documentation change: ---

Description Yi Zhao 2011-02-23 21:53:11 UTC 
Testing Env:    
Host: Ubuntu 10.10 x86_64
Kernel: 2.6.35-25-generic

beagleboard kernel and rootfs from weekly build 20110221
http://autobuilder.pokylinux.org/nightly/20110221-1/machines/beagleboard/arm/

u-boot environment setting:
###########
setenv optargs 'omapdss.def_disp=dvi vram=12M omapfb.mode="dvi:800x480MR-16@60" video=omapfb.vram:0:4M,1:4M,2:4M omapfb.debug=y omapdss.debug=y'
setenv console ttyO2,115200n8;mmcinit;fatload mmc 0 0x80800000 uImage.bin;run mmcargs; bootm 0x80800000
###########

When startup Xserver, I got the error message:
###################
Starting Xserver
fbset: can't open '/dev/fb0': No such file or directory
fbset: can't open '/dev/fb0': No such file or directory
fbset: can't open '/dev/fb0': No such file or directory

Error opening framebuffer /dev/fb0: No such file or directory

Fatal server error:
no screens found
xinit: giving up
xinit: unable to connect to X server: Connection refused
xinit: server error
Timeout waiting for org.matchbox_project.desktop.Loaded
###################

There is no /dev/fb0 under /dev/ directory.

When I create fb0 device manually, the issue still happen:
###################
root@beagleboard:~# mknod /dev/fb0 c 29 0
root@beagleboard:~# /etc/rc5.d/S09xserver-nodm start
Starting Xserver
fbset: can't open '/dev/fb0': No such device
fbset: can't open '/dev/fb0': No such device
fbset: can't open '/dev/fb0': No such device

Error opening framebuffer /dev/fb0: No such device

Fatal server error:
no screens found

####################

More info:
###################
root@beagleboard:~# uname -a
Linux beagleboard 2.6.37.1-yocto-standard+ #1 PREEMPT Tue Feb 22 03:05:15 PST 2011 armv7l GNU/Linux
###################
Comment 1 Bruce Ashfield 2011-02-24 06:50:40 UTC 
I'm trying to recall if we used graphics on the beagle board for the
2.6.34 based demos. I don't think we did. Can someone help my
memory by confirming whether this worked in 2.6.34 ? Just trying to
properly classify this as a regression or not.

As for 2.6.37 based framebuffer / X support, this is expected to not
work (by me at least). We did a minimal 2.6.37 BSP, which didn't
include graphics, and we'll add to it in the post 1.0 timeframe. There are
merges that I've staged for this, but they are big enough that putting
them in during the 1.0 stabilization wasn't feasible.

But I'd like Darren to confirm the above, since he's had hands on the
board more recently than I have.
Comment 2 Yi Zhao 2011-02-24 19:24:38 UTC 
I tested a 2.6.34 kernel from autobuilder weekly build 20110126:

uImage-2.6.34+git0+b67e060194a38c6331da1532bd06446087a42b3b_0+0431115c9d720fee5bb105f6a7411efb4f851d26-r12-beagleboard-20110127143833.bin

poky-image-sato-beagleboard-20110127162807.rootfs.tar.bz2

With this build, the /dev/fb0 can be created successfully. The X server can startup and the desktop display has no problem on a LCD monitor.

#################
root@beagleboard:~# dmesg|grep fb -i
omapfb: configured for panel omap3beagle
omapfb: DISPC version 3.0 initialized
omapfb: Framebuffer initialized. Total vram 1572864 planes 1
omapfb: Pixclock 48000 kHz hfreq 44.7 kHz vfreq 57.7 Hz
##################
Comment 3 Bruce Ashfield 2011-03-03 17:56:28 UTC 
Moving this to 1.1 where we'll have a completely new strategy for the beagleboard BSP.
Comment 4 Bruce Ashfield 2011-05-16 13:52:30 UTC 
darren. Want this one ?
Comment 5 Darren Hart 2011-06-07 17:02:16 UTC 
I'm building with a linux-omap + patches from meta-ti and am currently whittling down the config. I am able to get the splash screen and the X desktop now. I had to delete the udev device cache (/etc/dev.tar*) before /dev/fb0 showed up. Manually creating the node (mknod /dev/fb0 char 29 0) also worked. Progress is being made.
Comment 6 Darren Hart 2011-06-28 09:05:41 UTC 
With the following commits, this is resolved:

commit ee4dd303b6667a691ed6093b13c226a7466ee31e
Author: Bruce Ashfield <bruce.ashfield@windriver.com>
Date:   Wed Jun 22 16:00:01 2011 -0400

    linux-yocto/meta-yocto: update yocto/standard and beagleboard SRCREVs


commit aaa4951d8b25591ebf7e98e02d8e7873d082d3e9
Author: Darren Hart <dvhart@linux.intel.com>
Date:   Mon Jun 20 14:13:21 2011 -0700

    beagleboard: switch to xserver-xf86-lite
Comment 7 Yi Zhao 2011-06-28 22:57:36 UTC 
Verified it with 20110625 build on beagleboard C4

Tree/Branch: Poky/Master
Poky Commit: a1f79a7896b6411669b3ccada6204d2695e80fc5