** Tags added: cscc
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Title:
Black screen on 18.04 + AMD RX460
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Just as an update, in the Freedesktop issue, I found using a LOWER
specced/older cable to fix the problem.
I do not know how to debug it further but I suspect the bug is in the
support of later version of the HDMI standard.
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I have previously created an upstream bug report for this:
https://bugs.freedesktop.org/show_bug.cgi?id=107668
** Bug watch added: freedesktop.org Bugzilla #107668
https://bugs.freedesktop.org/show_bug.cgi?id=107668
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** Changed in: linux (Ubuntu Bionic)
Assignee: Joseph Salisbury (jsalisbury) => (unassigned)
** Changed in: linux (Ubuntu)
Assignee: Joseph Salisbury (jsalisbury) => (unassigned)
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Seems to be another AMDGPU DC issue...
Please try mainline kernel v4.20-rc6.
If it doesn't solve the issue, please file an upstream bug at
https://bugs.freedesktop.org/
Product: DRI
Component: DRM/amdgpu
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I'm getting exactly this issue. An ATI RX 480 on Kubuntu 18.04 with a
ASUS MG28U on HDMI-1. It is on a 5m cable so using the displayport
wasn't an option. The long HDMI cable is to allow the large system box
to be away from my desk. I mostly use the system as a web and data
server and it is
HI guys,
Im trying to use my second Monitor with this videocard, i do not know if
i have the same issue but my HDMI monitor just would not work. it worked
before the update and only with kernels until 4.13... i don't know if i
have to put some info here or somewhere else.
thanks.
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Problem persists in kernel 4.17-rc6 from http://kernel.ubuntu.com
/~kernel-ppa/mainline/v4.17-rc6/
#uname -r
4.17.0-041700rc6-generic
#cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-4.17.0-041700rc6-generic amdgpu.cik_support=1
radeon.cik_support=0 amdgpu.dc=1
#ls /sys/class/drm
card0 card0-eDP-1
Problem persists in kernel 4.16.11
#uname -r
4.16.11-041611-generic
#ls /sys/class/drm
card0 card0-eDP-1 card0-HDMI-A-1 renderD128 ttm version
#dmesg | grep drm
[1.783188] [drm] radeon kernel modesetting enabled.
[1.784832] fb: switching to radeondrmfb from EFI VGA
[1.831813]
Problem still exists in 4.16.10 kernel from
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.16.10/
(#uname -r output is 4.16.10-041610-generic )
dmesg output gives same error output as before when amdgpu.dc=1
[1.866312] [drm] amdgpu: 1024M of VRAM memory ready
[1.866316] [drm]
Problem still exists in 4.16.9 kernel from
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.16.9/
(#uname -r output is 4.16.9-041609-generic )
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Some information from me, using 4.16.8 kernel
System is Lenovo Z50-75 laptop with AMD-A10 cpu (Kaveri) and both HDMI and VGA
ports. I use the VGA port to which is connected an Acer X223HQ display, capable
of displaying up to 1920x1080. The laptop screen is also 1920x1080
If system is booted
I booted the 4.17rc1 kernel.
In order to see output I connected an old TV to the DVI output, and that
output was successfully detected (through an DVI-HDMI adapter, if that
matters).
The output of /sys/class/drm/card0-HDMI-A-1 in this case:
dpms: Off
enabled: disabled
modes: (empty)
Thanks, mind posting the same for the non-working kernel? I'm curious if the
problem is
1) we don't detect the display
2) we don't enable the display
3) we enable the display but wrong
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I'm not sure if you asked for the contents of these files from a working
or non-working kernel, but I'll take the working kernel since that's
obviously a lot easier.
The monitor, Dell U2415, is connected via its input source "HDMI (MHL)
2". The monitor name "DELL U2415" shows up in the edid
Is it HDMI from the board to HDMI on the monitor? I'd like to rule out
any use of an adapter or HDMI-to-DVI cable.
What monitor is this?
Is the monitor detected?
What do you see in the 'status', 'enabled', 'dpms', and 'modes' files in
/sys/class/drm/card0-HDMI-A-1/ ?
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What display connectors are being used?
If this is about displays with VGA or LVDS connections this is the same
bug as upstream bug https://bugs.freedesktop.org/show_bug.cgi?id=105880
mentioned above.
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Kernel 4.15.0-15-generic #16~lp1761751v2: Boots normally
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Title:
Black screen on 18.04 + AMD RX460
To manage notifications about this bug go
I built a Bionic test kernel with the following one config option not
set:
CONFIG_DRM_AMD_DC_PRE_VEGA
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1761751
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The test kernel (4.15.0-15-generic #16~lp1761751) boots normally.
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Title:
Black screen on 18.04 + AMD RX460
To manage notifications about this
Also, with this test kernel both the linux-image and linux-image-extra
.debs need to be installed.
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Title:
Black screen on 18.04 + AMD RX460
To
I built a Bionic test kernel with the following two config options not
set:
CONFIG_DRM_AMD_DC_PRE_VEGA
CONFIG_DRM_AMD_DC_DCN1_0
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1761751
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I've also been building all of the bisect testing kernel with Bionic
configs, which may explain why they are all bad.
I'll build a bionic test kernel with these two configs reverted back.
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Yeah, so I doubt it's a whitespace fix in the rxrpc driver. However, a
diff between the configs on v415-rc2 and v415-rc3 has lots of
differences, the most interesting being this one:
$ diff -u config-4.15.0-041500rc2-generic config-4.15.0-041500rc3-generic
/* ... snip ... */
@@ -5675,9 +5677,9
Kernel 3d7682af228fd78dc46bc: Black screen.
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Title:
Black screen on 18.04 + AMD RX460
To manage notifications about this bug go to:
I built the next test kernel, up to the following commit:
3d7682af228fd78dc46bc6bf40e0268ad04521ec
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1761751
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Kernel 5fc62f6a139a7b06b027bf442cd4205619506f59: Black screen.
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Title:
Black screen on 18.04 + AMD RX460
To manage notifications about this bug
I built the next test kernel, up to the following commit:
5fc62f6a139a7b06b027bf442cd4205619506f59
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1761751
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Kernel 282ef4729195c8503f7101d574acfb5e7c8a8209: Black screen.
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Title:
Black screen on 18.04 + AMD RX460
To manage notifications about this bug
I built the next test kernel, up to the following commit:
282ef4729195c8503f7101d574acfb5e7c8a8209
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1761751
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Linux version 4.15.0-041500rc1-generic (jsalisbury@kathleen) (gcc
version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #201804181224: Black screen
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There are only 3 kernels left to test, so I hope we hit a good results
soon.
I built the next test kernel, up to the following commit:
3016dad75b48279e579117ee3ed566ba90a3b023
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1761751
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There's nothing graphics related here:
$ git log v4.15-rc2..a0da456bbf95d2a9294799bb --oneline
a0da456 net: phy-micrel: check return code in flp center function
c7799c0 tipc: call tipc_rcv() only if bearer is up in tipc_udp_recv()
cfac7f8 tcp/dccp: block bh before arming time_wait timer
b484d8a
Kernel a0da456bbf95d2a9294799bb05c61bfb24736bb7: Black screen.
This is starting to feel a bit fishy but maybe git knows what it's
doing. :-)
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I built the next test kernel, up to the following commit:
a0da456bbf95d2a9294799bb05c61bfb24736bb7
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1761751
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Kernel af57b7fffaf74ff337e479abb19026d72065673b: Black screen.
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Title:
Black screen on 18.04 + AMD RX460
To manage notifications about this bug
I built the next test kernel, up to the following commit:
af57b7fffaf74ff337e479abb19026d72065673b
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1761751
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Kernel 2391f0b4808e3d5af348324d69f5f45c56a26836: Black screen.
Kernel 4.17-rc1: Black screen.
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Title:
Black screen on 18.04 + AMD RX460
To
Whoops, yes, the last kernel was the second.
I built the next test kernel, up to the following commit:
2391f0b4808e3d5af348324d69f5f45c56a26836
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1761751
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> I built the first test kernel, up to the following commit:
You mean the second test kernel, I presume?
Kernel 6a5e05a47b6cb8e59bfad351444322b1e4012326: Black screen.
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I built the first test kernel, up to the following commit:
6a5e05a47b6cb8e59bfad351444322b1e4012326
The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1761751
Can you test that kernel and report back if it has the bug or not? I
will build the next test kernel based on
Possibly upstream bug found:
https://bugs.freedesktop.org/show_bug.cgi?id=105880
** Bug watch added: freedesktop.org Bugzilla #105880
https://bugs.freedesktop.org/show_bug.cgi?id=105880
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Kernel 4.15rc2+78d9b048446c3c0a83313444fb706f8f3bccdae7: Black screen.
Note: I installed the linux-image-...-generic deb only as the header
ones seemed to require libssl1.1...?
Anyway, I did some research on my own as well.
First, I had a look at the commits between 4.15rc2 and 4.15rc3. The
I started a kernel bisect between v4.15-rc2 and v4.15-rc3. The kernel
bisect will require testing of about 7-10 test kernels.
I built the first test kernel, up to the following commit:
78d9b048446c3c0a83313444fb706f8f3bccdae7
The test kernel can be downloaded from:
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => Joseph Salisbury (jsalisbury)
** Changed in: linux (Ubuntu Bionic)
Status: Triaged => In Progress
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4.15.0-041500rc2-generic - Boots normally
4.15.0-041500rc3-generic - Black screen
4.15.0-041500rc4-generic - Not tested
So something between rc2 and rc3 it is then...
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v4.14 Final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.14/ - Boots
normally
v4.15-rc1: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15-rc1/ - Boots
normally
v4.15-rc5: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15-rc5/ - Black
screen
v4.15-rc9:
I'd like to perform a bisect to figure out what commit caused this
regression. We need to identify the earliest kernel where the issue
started happening as well as the latest kernel that did not have this
issue.
Can you test the following kernels and report back? We are looking for
the first
Ok, so I found this message when trying to boot a faulty kernel without
workaround, if it helps:
[1.797127] [drm] Cannot find any crtc or sizes
[1.799000] [drm] Initialized amdgpu 3.23.0 20150101 for :23:00.0 on
minor 0
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** Description changed:
I've been running 16.04 + hwe kernel 4.15 for a while now and recently
I'm now having a black screen instead. I've also tried an 18.04 daily
live USB stick, which has the same issue.
It probably started during an upgrade this week or last week. As a start
I'm
** Description changed:
I've been running 16.04 + hwe kernel 4.15 for a while now and recently
I'm now having a black screen instead. I've also tried an 18.04 daily
live USB stick, which has the same issue.
It probably started during an upgrade this week or last week. As a start
I'm
** Attachment added: "lspci.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1761751/+attachment/5104013/+files/lspci.txt
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