Re: drm-i915-mst + Ubuntu 14.04 + HP 840

[David Airlie <airlied@redhat.com>]

Just try a 3.17 based kernel if you can.

and make sure you have a new enough intel userspace driver.

Dave.

----- Original Message -----
> From: "Michal Nazarewicz" <mina86@mina86.com>
> To: airlied@redhat.com
> Cc: intel-gfx@lists.freedesktop.org
> Sent: Saturday, 8 November, 2014 5:55:00 AM
> Subject: drm-i915-mst + Ubuntu 14.04 + HP 840
> 
> Hi Dave,
> 
> I'm trying to get your drm-i915-mst-v3.16[1] branch applied on top of
> Ubuntu[2] kernel[3] to get HP's 840 notebook to handle two DPs port on
> the docking station but I'm hitting some problems with your patches.  Or
> so I think.
> 
> If I start and boot with the laptop connected to the docking station and
> the screens, I'm getting BUGs (full dmesg attached) and X refuses to
> start at all.  E.g.:
> 
> ------------------------ >8 ----------------------------------------
> [   12.493151] [drm:intel_pipe_config_compare] *ERROR* mismatch in
> adjusted_mode.crtc_clock (expected 119000, found 0)
> [   12.493171] WARNING: CPU: 0 PID: 61 at
> /home/mpn/code/linux/drivers/gpu/drm/i915/intel_display.c:10221
> check_crtc_state+0x235/0x350 [i915]()
> 
> [   12.503272] [drm:intel_pipe_config_compare] *ERROR* mismatch in
> adjusted_mode.crtc_clock (expected 119000, found 0)
> [   12.503284] WARNING: CPU: 0 PID: 61 at
> /home/mpn/code/linux/drivers/gpu/drm/i915/intel_display.c:10221
> check_crtc_state+0x235/0x350 [i915]()
> 
> [   12.503449] [drm:intel_pipe_config_compare] *ERROR* mismatch in
> adjusted_mode.crtc_clock (expected 119000, found 0)
> [   12.503460] WARNING: CPU: 0 PID: 61 at
> /home/mpn/code/linux/drivers/gpu/drm/i915/intel_display.c:10221
> check_crtc_state+0x235/0x350 [i915]()
> ------------------------ >8 ----------------------------------------
> 
> If I boot up with laptop disconnected from the docking station and
> connect it later on, I'm getting the following errors:
> 
> ------------------------ >8 ----------------------------------------
> [  248.615216] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
> alignment
> [  248.629843] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
> alignment
> [  248.630412] acpi PNP0501:00: Still not present
> [  252.261562] usb 3-1: new SuperSpeed USB device number 5 using xhci_hcd
> [  252.277626] usb 3-1: New USB device found, idVendor=0424, idProduct=5534
> [  252.277630] usb 3-1: New USB device strings: Mfr=2, Product=3,
> SerialNumber=0
> [  252.277632] usb 3-1: Product: USB5534B
> [  252.277633] usb 3-1: Manufacturer: SMSC
> [  252.278047] hub 3-1:1.0: USB hub found
> [  252.278067] hub 3-1:1.0: 4 ports detected
> [  252.517255] usb 2-1: new high-speed USB device number 16 using xhci_hcd
> [  252.645530] usb 2-1: New USB device found, idVendor=0424, idProduct=2134
> [  252.645534] usb 2-1: New USB device strings: Mfr=1, Product=2,
> SerialNumber=0
> [  252.645536] usb 2-1: Product: USB2134B
> [  252.645538] usb 2-1: Manufacturer: SMSC
> [  252.645970] hub 2-1:1.0: USB hub found
> [  252.646024] hub 2-1:1.0: 4 ports detected
> [  252.693505] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
> alignment
> [  252.704220] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
> alignment
> [  252.704478] acpi PNP0501:00: Still not present
> ------------------------ >8 ----------------------------------------
> 
> Needless to say, “xrandr -q” did not detect any of the DisplayPort
> screens.
> 
> I was wondering if you had any idea what could be a problem?  Perhaps
> there is a newer version of your patchset that I should try?
> 
> [1] http://cgit.freedesktop.org/~airlied/linux/log/?h=drm-i915-mst-v3.16
> [2] Which probably wouldn't by your choice of a distro. ;)
> [3]
> http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-utopic.git;a=shortlog;h=refs/heads/master
> 
> --
> Best regards,                                         _     _
> .o. | Liege of Serenely Enlightened Majesty of      o' \,=./ `o
> ..o | Computer Science,  Michał “mina86” Nazarewicz    (o o)
> ooo +--<mpn@google.com>--<xmpp:mina86@jabber.org>--ooO--(_)--Ooo--
> 
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