** Description changed: + == SRU Justification == + + Impact: On some machines with an Ibex Peak PCH, SSC will be enabled on + the clock source used for analog outputs. This results in poor quality + output (described as "wavy") on the external display. + + Fix: A series of upstream backports to the i915 driver. With these + backports, i915 will check for the existence of a CK505 clock source, + and if present this is used as the clock source for analog outputs so + that SSC can remain enabled. Otherwise SSC is disabled. The PCH refclk + update code is also split out so that it can be called from additional + locations where the refclks should be updated. + + Test Case: Running with backports on an affected system will fix quality + issues on VGA outputs. Verified for oneiric on LP #614238. + + --- + A similar problem with Lucid was reported mainly by users of ATi Radeon graphics hardware. I also experienced the "wavy" output in Lucid, although the graphics h/w is the integrated intel that comes with the Core i3 processors. It is easy to reproduce. Just plug in an external monitor or projector. The output is not stable/solid and has waves that make it unusable. I tried the Maverick Alpha3 to see if it had been addressed in the 2.6.35 kernel but the problem is still apparent. The LCD display of the Laptop is rock solid and sharp. This only affects the external VGA from what I can tell. I do not have any hdmi devices to test with so cannot confirm if the symptoms are just VGA or any external monitor connection. Similar bug reports from Lucid include: 537640, 541501, 557814, 562138 although these all seem to relate to the ATI chipsets, the description of the problem sounds the same. I am happy to try upstream kernels and build/patch/compile if necessary. ProblemType: Bug DistroRelease: Ubuntu 10.10 Package: linux-image-2.6.35-14-generic 2.6.35-14.19 Regression: No Reproducible: Yes ProcVersionSignature: Ubuntu 2.6.35-14.19-generic 2.6.35 Uname: Linux 2.6.35-14-generic i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23. Architecture: i386 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: alord 1578 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xfc700000 irq 46' Mixer name : 'Intel IbexPeak HDMI' Components : 'HDA:10ec0269,144dc06a,00100004 HDA:80862804,80860101,00100000' Controls : 19 Simple ctrls : 9 Date: Fri Aug 6 07:47:00 2010 HibernationDevice: RESUME=UUID=bc66e046-4afc-4cb6-aa3e-d0f114e960e3 InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha i386 (20100803.1) Lsusb: Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 003: ID 1210:25f4 DigiTech Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: SAMSUNG ELECTRONICS CO., LTD. R530/R730 ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-14-generic root=UUID=3364d8e7-11e8-4000-a32e-8bfca4cac5aa ro quiet splash ProcEnviron: LANG=en_GB.utf8 SHELL=/bin/bash RelatedPackageVersions: linux-firmware 1.37 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux dmi.bios.date: 03/12/2010 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: 03JV.M011.20100312.hkk dmi.board.asset.tag: Tag 12345 dmi.board.name: R530/R730 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr03JV.M011.20100312.hkk:bd03/12/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnR530/R730:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnR530/R730:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A: dmi.product.name: R530/R730 dmi.product.version: Not Applicable dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/614238 Title: Intel Core i3 External Monitor Wavy Output To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/614238/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
