$ xrandr --props
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 32767 x 32767
VGA1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis)
410mm x 230mm
EDID:
00ffffffffffff001e6d094c07230800
071601036c291778ead025a258559c28
0f5054a76a00314f454f614f81c00101
010101010101662156aa51001e30468f
33009ae61000001e000000fd00384b1e
3d09000a202020202020000000fc0045
313934320a20202020202020000000ff
003230374e444e5546503235350a005e
1366x768 59.79*+
1280x720 59.97 +
1024x768 75.08 75.03 60.00
832x624 74.55
800x600 75.00 60.32 56.25
640x480 75.00 60.00
720x400 70.08
HDMI1 disconnected (normal left inverted right x axis y axis)
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
DP1 disconnected (normal left inverted right x axis y axis)
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
$ find /sys/devices/ |fgrep -i edid
/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-HDMI-A-1/edid
/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/edid
/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-HDMI-A-2/edid
/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-DP-1/edid
$ xxd /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-HDMI-A-1/edid
$ xxd /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/edid
00000000: 00ff ffff ffff ff00 4c83 5248 0000 0000 ........L.RH....
00000010: 0018 0103 9522 1378 0a71 0593 5557 8f29 .....".x.q..UW.)
00000020: 2050 5400 0000 0101 0101 0101 0101 0101 PT.............
00000030: 0101 0101 0101 411c 56a0 5000 1630 3020 ......A.V.P..00
00000040: 2500 58c2 1000 0019 0000 000f 0000 0000 %.X.............
00000050: 0000 0000 0020 5203 1500 0000 00fe 0053 ..... R........S
00000060: 414d 5355 4e47 0a20 4c83 4154 0000 00fe AMSUNG. L.AT....
00000070: 004c 544e 3135 3641 5433 374c 3032 00db .LTN156AT37L02..
$ xxd /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-HDMI-A-2/edid
$ xxd /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-DP-1/edid
$
** Description changed:
Colour bandind is visible everywhere in the system. I believe it's not a
hardware problem, since booting with 'nomodeset' works as expected and
the previously installed Ubuntu 14.04 also worked.
I tried installing kernel 4.18.0-16.17 from ppa:canonical-kernel-
team/ppa but the problem remained.
There were already similar bugs, https://bugs.launchpad.net/bugs/1749420
, https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1794387 and
https://bugs.launchpad.net/bugs/1788308, but the fixes provided for
those bugs did not work for my specific monitor.
cat /proc/version_signature
Ubuntu 4.15.0-46.49-generic 4.15.18
sudo lspci -vnvn
00:00.0 Host bridge [0600]: Intel Corporation Haswell-ULT DRAM Controller
[8086:0a04] (rev 0b)
- Subsystem: Lenovo Haswell-ULT DRAM Controller [17aa:390b]
- Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort+ >SERR- <PERR- INTx-
- Latency: 0
- Capabilities: [e0] Vendor Specific Information: Len=0c <?>
- Kernel driver in use: hsw_uncore
+ Subsystem: Lenovo Haswell-ULT DRAM Controller [17aa:390b]
+ Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
+ Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort+ >SERR- <PERR- INTx-
+ Latency: 0
+ Capabilities: [e0] Vendor Specific Information: Len=0c <?>
+ Kernel driver in use: hsw_uncore
00:02.0 VGA compatible controller [0300]: Intel Corporation Haswell-ULT
Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA
controller])
- Subsystem: Lenovo Haswell-ULT Integrated Graphics Controller [17aa:390b]
- Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
- Latency: 0
- Interrupt: pin A routed to IRQ 46
- Region 0: Memory at b0000000 (64-bit, non-prefetchable) [size=4M]
- Region 2: Memory at a0000000 (64-bit, prefetchable) [size=256M]
- Region 4: I/O ports at 4000 [size=64]
- [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
- Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
- Address: fee02004 Data: 4023
- Capabilities: [d0] Power Management version 2
- Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
- Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
- Capabilities: [a4] PCI Advanced Features
- AFCap: TP+ FLR+
- AFCtrl: FLR-
- AFStatus: TP-
- Kernel driver in use: i915
- Kernel modules: i915
+ Subsystem: Lenovo Haswell-ULT Integrated Graphics Controller [17aa:390b]
+ Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
+ Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
+ Latency: 0
+ Interrupt: pin A routed to IRQ 46
+ Region 0: Memory at b0000000 (64-bit, non-prefetchable) [size=4M]
+ Region 2: Memory at a0000000 (64-bit, prefetchable) [size=256M]
+ Region 4: I/O ports at 4000 [size=64]
+ [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
+ Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
+ Address: fee02004 Data: 4023
+ Capabilities: [d0] Power Management version 2
+ Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
+ Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
+ Capabilities: [a4] PCI Advanced Features
+ AFCap: TP+ FLR+
+ AFCtrl: FLR-
+ AFStatus: TP-
+ Kernel driver in use: i915
+ Kernel modules: i915
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1819968
Title:
Colour banding in Lenovo G50-80 laptop display (i915)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1819968/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
