** Description changed: Horrible screen flicker from login screen and after login. 18.04.1 LTS. - I have two similar laptops, both Lenovo Ideapad 720s 13IKB, - model 81A8 - Core i5 7200U - Intel HD Graphics 620 Rev 02 - works fine. - model 81BV - Core i5 8250U - Intel UHD Graphics 620 Rev 07 - awful screen flashing. + I have two similar laptops, both Lenovo Ideapad 720s 13IKB, + (1) model 81A8 - Core i5 7200U - Intel HD Graphics 620 Rev 02 - works fine. + (2) model 81BV - Core i5 8250U - Intel UHD Graphics 620 Rev 07 - awful screen flashing. - Neither have the problem in Windows (ie hardware fine) + Neither have the problem in Windows (ie hardware fine). Both have UHD + 3840x2160 resolution (not sure why (1) says Intel HD graphics instead of + UHD) - I installed the standard Ubuntu 18.04 on each of them (same USB Key, few - weeks apart) but only the 81BV / 8th gen / UHD 620 Rev 07 has the - problem. + I installed the standard Ubuntu 18.04 on each of them (same USB Key + image, a few weeks apart) but only (2) the 81BV / 8th gen / UHD 620 Rev + 07 has the problem. - Flickering visible on video here: - https://photos.app.goo.gl/HCN73q1nQfgstgVBA + Flickering visible on video here: https://photos.app.goo.gl/HCN73q1nQfgstgVBA + I would describe as lots of random-looking colours in horizontal lines, as though the wrong memory was being mapped to the screen. Happens constantly/sporadically every second or two. (under zero / negligible load). Looks low-level, not associated with windows / graphics artefacts. + Problem does not occur under Windows(TM) 10, nor with grub editor, but does occur with console. (I can video the boot if it helps) I've used ubuntu-bug so I believe you have all the details of the machine. The install came straight from your standard 18.04 download. Any changes are due to me trying to fix this (not much prev exp of kernel params etc) Things tried but which didn't work were: enable huc/guc (got it to load but no change) enable_rc6=0 (just stopped sleep / resume working) edp_vswing=2 + upgrade bios to 6MCN27WW (was -18WW I think) + + Many thanks. (Text below is generated by ubuntu-bug) ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xserver-xorg-video-intel 2:2.99.917+git20171229-1 ProcVersionSignature: Ubuntu 4.15.0-30.32-generic 4.15.18 Uname: Linux 4.15.0-30-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 CompositorRunning: None Date: Tue Aug 7 23:09:14 2018 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: - Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA controller]) - Subsystem: Lenovo UHD Graphics 620 [17aa:39af] + Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA controller]) + Subsystem: Lenovo UHD Graphics 620 [17aa:39af] InstallationDate: Installed on 2018-08-06 (1 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) Lsusb: - Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub - Bus 001 Device 004: ID 0cf3:e500 Atheros Communications, Inc. - Bus 001 Device 003: ID 5986:210d Acer, Inc - Bus 001 Device 002: ID 06cb:0081 Synaptics, Inc. - Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub + Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub + Bus 001 Device 004: ID 0cf3:e500 Atheros Communications, Inc. + Bus 001 Device 003: ID 5986:210d Acer, Inc + Bus 001 Device 002: ID 06cb:0081 Synaptics, Inc. + Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 81BV ProcEnviron: - TERM=xterm-256color - PATH=(custom, no user) - LANG=en_GB.UTF-8 - SHELL=/bin/bash + TERM=xterm-256color + PATH=(custom, no user) + LANG=en_GB.UTF-8 + SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-30-generic root=UUID=10eb4e00-26e4-4f42-b983-9a603a658f89 ro i915.enable_guc=3 i915.enable_guc_loading=1 SourcePackage: xserver-xorg-video-intel UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/02/2018 dmi.bios.vendor: LENOVO dmi.bios.version: 6MCN27WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo ideapad 720S-13IKB dmi.modalias: dmi:bvnLENOVO:bvr6MCN27WW:bd05/02/2018:svnLENOVO:pn81BV:pvrLenovoideapad720S-13IKB:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrLenovoideapad720S-13IKB: dmi.product.family: ideapad 720S-13IKB dmi.product.name: 81BV dmi.product.version: Lenovo ideapad 720S-13IKB dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.91-2 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~18.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~18.04.1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2
** Description changed: Horrible screen flicker from login screen and after login. 18.04.1 LTS. I have two similar laptops, both Lenovo Ideapad 720s 13IKB, (1) model 81A8 - Core i5 7200U - Intel HD Graphics 620 Rev 02 - works fine. (2) model 81BV - Core i5 8250U - Intel UHD Graphics 620 Rev 07 - awful screen flashing. Neither have the problem in Windows (ie hardware fine). Both have UHD 3840x2160 resolution (not sure why (1) says Intel HD graphics instead of UHD) I installed the standard Ubuntu 18.04 on each of them (same USB Key image, a few weeks apart) but only (2) the 81BV / 8th gen / UHD 620 Rev 07 has the problem. Flickering visible on video here: https://photos.app.goo.gl/HCN73q1nQfgstgVBA - I would describe as lots of random-looking colours in horizontal lines, as though the wrong memory was being mapped to the screen. Happens constantly/sporadically every second or two. (under zero / negligible load). Looks low-level, not associated with windows / graphics artefacts. - Problem does not occur under Windows(TM) 10, nor with grub editor, but does occur with console. (I can video the boot if it helps) + I would describe it as lots of random-looking colours in horizontal lines, as though the wrong memory was being mapped to the screen. Happens constantly/sporadically every second or two. (under zero / negligible load). Looks low-level, not associated with windows / graphics artefacts. + Problem does not occur under Windows(TM) 10, nor with grub editor, but does occur with console during boot. (I can video the boot if it helps) I've used ubuntu-bug so I believe you have all the details of the machine. The install came straight from your standard 18.04 download. - Any changes are due to me trying to fix this (not much prev exp of - kernel params etc) + It immediately had the problem, including when running from the USB + image. Any changes from the default install are due to me trying to fix + this problem (I do not have much previous experience of kernel params + etc) Things tried but which didn't work were: - enable huc/guc (got it to load but no change) - enable_rc6=0 (just stopped sleep / resume working) - edp_vswing=2 - upgrade bios to 6MCN27WW (was -18WW I think) + - enable huc/guc (got it to load but no change) + - enable_rc6=0 (just stopped sleep / resume working) + - edp_vswing=2 + - upgrade Lenovo bios to 6MCN27WW (was -18WW I think) + - apt update/upgrade. Many thanks. (Text below is generated by ubuntu-bug) ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xserver-xorg-video-intel 2:2.99.917+git20171229-1 ProcVersionSignature: Ubuntu 4.15.0-30.32-generic 4.15.18 Uname: Linux 4.15.0-30-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 CompositorRunning: None Date: Tue Aug 7 23:09:14 2018 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA controller]) Subsystem: Lenovo UHD Graphics 620 [17aa:39af] InstallationDate: Installed on 2018-08-06 (1 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 004: ID 0cf3:e500 Atheros Communications, Inc. Bus 001 Device 003: ID 5986:210d Acer, Inc Bus 001 Device 002: ID 06cb:0081 Synaptics, Inc. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 81BV ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-30-generic root=UUID=10eb4e00-26e4-4f42-b983-9a603a658f89 ro i915.enable_guc=3 i915.enable_guc_loading=1 SourcePackage: xserver-xorg-video-intel UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/02/2018 dmi.bios.vendor: LENOVO dmi.bios.version: 6MCN27WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo ideapad 720S-13IKB dmi.modalias: dmi:bvnLENOVO:bvr6MCN27WW:bd05/02/2018:svnLENOVO:pn81BV:pvrLenovoideapad720S-13IKB:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrLenovoideapad720S-13IKB: dmi.product.family: ideapad 720S-13IKB dmi.product.name: 81BV dmi.product.version: Lenovo ideapad 720S-13IKB dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.91-2 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~18.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~18.04.1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 ** Description changed: Horrible screen flicker from login screen and after login. 18.04.1 LTS. I have two similar laptops, both Lenovo Ideapad 720s 13IKB, - (1) model 81A8 - Core i5 7200U - Intel HD Graphics 620 Rev 02 - works fine. - (2) model 81BV - Core i5 8250U - Intel UHD Graphics 620 Rev 07 - awful screen flashing. + model 81A8 - Core i5 7200U - Intel HD Graphics 620 Rev 02 - works fine. + model 81BV - Core i5 8250U - Intel UHD Graphics 620 Rev 07 - awful screen flashing. - Neither have the problem in Windows (ie hardware fine). Both have UHD - 3840x2160 resolution (not sure why (1) says Intel HD graphics instead of - UHD) + Neither have the problem in Windows (ie hardware fine) - I installed the standard Ubuntu 18.04 on each of them (same USB Key - image, a few weeks apart) but only (2) the 81BV / 8th gen / UHD 620 Rev - 07 has the problem. + I installed the standard Ubuntu 18.04 on each of them (same USB Key, few + weeks apart) but only the 81BV / 8th gen / UHD 620 Rev 07 has the + problem. - Flickering visible on video here: https://photos.app.goo.gl/HCN73q1nQfgstgVBA - I would describe it as lots of random-looking colours in horizontal lines, as though the wrong memory was being mapped to the screen. Happens constantly/sporadically every second or two. (under zero / negligible load). Looks low-level, not associated with windows / graphics artefacts. - Problem does not occur under Windows(TM) 10, nor with grub editor, but does occur with console during boot. (I can video the boot if it helps) + Flickering visible on video here: + https://photos.app.goo.gl/HCN73q1nQfgstgVBA I've used ubuntu-bug so I believe you have all the details of the machine. The install came straight from your standard 18.04 download. - It immediately had the problem, including when running from the USB - image. Any changes from the default install are due to me trying to fix - this problem (I do not have much previous experience of kernel params - etc) + Any changes are due to me trying to fix this (not much prev exp of + kernel params etc) Things tried but which didn't work were: - - enable huc/guc (got it to load but no change) + - enable huc/guc (got it to load - it's now visible in the attached dmesg - but didn't help.) - enable_rc6=0 (just stopped sleep / resume working) - edp_vswing=2 - - upgrade Lenovo bios to 6MCN27WW (was -18WW I think) - - apt update/upgrade. - - Many thanks. (Text below is generated by ubuntu-bug) ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xserver-xorg-video-intel 2:2.99.917+git20171229-1 ProcVersionSignature: Ubuntu 4.15.0-30.32-generic 4.15.18 Uname: Linux 4.15.0-30-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 CompositorRunning: None Date: Tue Aug 7 23:09:14 2018 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA controller]) Subsystem: Lenovo UHD Graphics 620 [17aa:39af] InstallationDate: Installed on 2018-08-06 (1 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 004: ID 0cf3:e500 Atheros Communications, Inc. Bus 001 Device 003: ID 5986:210d Acer, Inc Bus 001 Device 002: ID 06cb:0081 Synaptics, Inc. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 81BV ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-30-generic root=UUID=10eb4e00-26e4-4f42-b983-9a603a658f89 ro i915.enable_guc=3 i915.enable_guc_loading=1 SourcePackage: xserver-xorg-video-intel UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/02/2018 dmi.bios.vendor: LENOVO dmi.bios.version: 6MCN27WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo ideapad 720S-13IKB dmi.modalias: dmi:bvnLENOVO:bvr6MCN27WW:bd05/02/2018:svnLENOVO:pn81BV:pvrLenovoideapad720S-13IKB:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrLenovoideapad720S-13IKB: dmi.product.family: ideapad 720S-13IKB dmi.product.name: 81BV dmi.product.version: Lenovo ideapad 720S-13IKB dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.91-2 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~18.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~18.04.1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1785912 Title: Screen flicker Intel UHD graphics 620 (rev 07) Lenovo Ideapad 720s 13IKB 81BV To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1785912/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
