[Openicc] HP Elitebook 8540W notebook with Dreamcolor display

[Emil Briggs]

On Sunday 13 February 2011 01:55:52 Kai-Uwe Behrmann wrote:
> Am 12.02.11, 11:12 -0500 schrieb Emil Briggs:
> > On Saturday 12 February 2011 10:20:34 Kai-Uwe Behrmann wrote:
> >> Am 12.02.11, 09:00 -0500 schrieb Emil Briggs:
> >>> to see what was there and it gave me a "No displays found" message.
> >>> 
> >>> i2cdetect -l shows 10 separate /dev/i2c-* nvidia entries so the kernel
> >>> i2c support is there. I ran hpdc_util again with strace and started
> >>> looking through the code. The devices are opened successfully but
> >>> writing to them fails. I'm not quite sure how to proceed next. I do
> >>> have the Quadro graphics card with the proprietary driver. Just for
> >>> kicks I tried using the opensource nvidia driver but this does not
> >>> work -- looking in the Xorg.0.log it finds the I2C/ddc interfaces but
> >>> is unable to read any EDID information from them.
> >> 
> >> Did you see the forum post on the ookala-mcf page around EDID?
> >> http://sourceforge.net/projects/ookala-mcf/forums/forum/898199/topic/339
> >> 741 5
> > 
> > I had not but it's not a permissions issue since I ran it as root after
> > the it failed as a non privileged user.
> 
> Did you try Xcm/libXcm[1] to see the i2c channels?
> "xcmddc requests EDID from a monitor over the i2c bus."
> libXcm installs a udev rule for activating the i2c bus.
> 


No nodes found and strace shows the same thing I saw with hpdc_util.


open("/dev/", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
fcntl(3, F_GETFD)                       = 0x1 (flags FD_CLOEXEC)
brk(0)                                  = 0x192a000
brk(0x1953000)                          = 0x1953000
getdents64(3, /* 198 entries */, 32768) = 5784
open("/dev/i2c-9", O_RDWR)              = 4
ioctl(4, 0x703, 0x50)                   = 0
nanosleep({0, 50000000}, NULL)          = 0
write(4, "\0", 1)                       = -1 EIO (Input/output error)
open("/dev/i2c-8", O_RDWR)              = 5
ioctl(5, 0x703, 0x50)                   = 0
nanosleep({0, 50000000}, NULL)          = 0
write(5, "\0", 1)                       = -1 EIO (Input/output error)
open("/dev/i2c-7", O_RDWR)              = 6
ioctl(6, 0x703, 0x50)                   = 0
nanosleep({0, 50000000}, NULL)          = 0
write(6, "\0", 1)                       = -1 EIO (Input/output error)
open("/dev/i2c-6", O_RDWR)              = 7
ioctl(7, 0x703, 0x50)                   = 0
nanosleep({0, 50000000}, NULL)          = 0
write(7, "\0", 1)                       = -1 EIO (Input/output error)
open("/dev/i2c-5", O_RDWR)              = 8
ioctl(8, 0x703, 0x50)                   = 0
nanosleep({0, 50000000}, NULL)          = 0
write(8, "\0", 1)                       = -1 EIO (Input/output error)
open("/dev/i2c-4", O_RDWR)              = 9
ioctl(9, 0x703, 0x50)                   = 0
nanosleep({0, 50000000}, NULL)          = 0
write(9, "\0", 1)                       = -1 EIO (Input/output error)
open("/dev/i2c-3", O_RDWR)              = 10
ioctl(10, 0x703, 0x50)                  = 0
nanosleep({0, 50000000}, NULL)          = 0
write(10, "\0", 1)                      = -1 EIO (Input/output error)
open("/dev/i2c-2", O_RDWR)              = 11
ioctl(11, 0x703, 0x50)                  = 0
nanosleep({0, 50000000}, NULL)          = 0
write(11, "\0", 1)                      = -1 EIO (Input/output error)
open("/dev/i2c-1", O_RDWR)              = 12
ioctl(12, 0x703, 0x50)                  = 0
nanosleep({0, 50000000}, NULL)          = 0
write(12, "\0", 1)                      = -1 EIO (Input/output error)
open("/dev/i2c-0", O_RDWR)              = 13
ioctl(13, 0x703, 0x50)                  = 0
nanosleep({0, 50000000}, NULL)          = 0
write(13, "\0", 1)                      = -1 EIO (Input/output error)