** Description changed: + SRU Justification: + + Impact: On laptops with pineview graphics external monitor only mode can cause the output to flicker. + Fix: + Upstream commits: + 9553426372eef71c849499fb1d232f4b0577c0f9 + d4294342fd4b94a3297867da00c1c5e929c28d4f + These fix the issue by adding in proper support to set the Pineview CxSR registers. On patch ensure the hooks are setup properly and this state isn't overwritten, and the other patch adds a table which contains proper memory latencies for DDR3 memory on Pineview. + + Testcase: + 1) Connect external VGA monitor to laptop. + 2) Set mode to external VGA only with its maximum resolution. (see test.sh) + 3) Use xrandr to rotate monitor a few times, and turn on and off (see irritate.sh) + 4) Press a few keys on the keyboard, and the keyboard will start flickering. + + -- + This bug is present in lucid (2.6.32-41 #90), but is fixed in maverick. If I install the maverick backported kernel it fixes the issue. More specifically its fixed in v2.6.35-rc2 (79a78dd6266a4f3e31c800e941ec62e250770a7d) And broken in v2.6.35-rc1 (6c9468e9eb1252eaefd94ce7f06e1be9b0b641b1) - However, bisection between these commits has not been successful in isolating the patch. + However, bisection between these commits has not been successful in isolating the patch. To reproduce: 1) Connect external VGA monitor to laptop. 2) Set mode to external VGA only with its maximum resolution. (see test.sh) 3) Use xrandr to rotate monitor a few times, and turn on and off (see irritate.sh) 4) Press a few keys on the keyboard, and the keyboard will start flickering. If both internal and external monitors are active, this problem does not exist. Occasionally the flickering will stop. ProblemType: Bug DistroRelease: Ubuntu 10.04 Package: linux-image-2.6.32-41-generic 2.6.32-41.90 Regression: No Reproducible: Yes ProcVersionSignature: Ubuntu 2.6.32-41.90-generic 2.6.32.59+drm33.24 Uname: Linux 2.6.32-41-generic x86_64 NonfreeKernelModules: wl AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 1156 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf6dfc000 irq 21' Mixer name : 'Realtek ALC269' Components : 'HDA:10ec0269,102804a5,00100100' Controls : 13 Simple ctrls : 8 Date: Fri May 25 16:01:36 2012 HibernationDevice: RESUME=UUID=2301a55d-d703-401e-8cf8-31bc9b19fe65 InstallationMedia: Ubuntu 10.04.4 LTS "Lucid Lynx" - Release amd64 (20120214.2) Lsusb: Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. Latitude 2120 ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-41-generic root=UUID=983f30ea-8263-4bd4-ba28-bac3ab91034c ro drm.debug=0x06 quiet splash ProcEnviron: LANG=en_US.utf8 SHELL=/bin/bash RelatedPackageVersions: linux-firmware 1.34.14 RfKill: 0: dell-wifi: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux dmi.bios.date: 10/27/2010 dmi.bios.vendor: Dell Inc. dmi.bios.version: A00 dmi.board.name: 0YY3FH dmi.board.vendor: Dell Inc. dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA00:bd10/27/2010:svnDellInc.:pnLatitude2120:pvr:rvnDellInc.:rn0YY3FH:rvr:cvnDellInc.:ct8:cvr: dmi.product.name: Latitude 2120 dmi.sys.vendor: Dell Inc.
** Summary changed: - [pineview] drm/i915 : external VGA1 only mode causes screen flickering + [sru][pineview] drm/i915 : external VGA1 only mode causes screen flickering -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1004707 Title: [sru][pineview] drm/i915 : external VGA1 only mode causes screen flickering To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1004707/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
