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Tasklist

FS#19234 - [linux] i915 driver detects ghost TV output

Attached to Project: Arch Linux
Opened by Joël Schaerer (lardon) - Saturday, 24 April 2010, 13:14 GMT
Last edited by Jan de Groot (JGC) - Monday, 07 November 2011, 13:21 GMT
Task Type Bug Report
Category Kernel
Status Closed
Assigned To Tobias Powalowski (tpowa)
Jan de Groot (JGC)
Thomas Bächler (brain0)
Architecture All
Severity Medium
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 1
Private No

Details

Description:

GDM sometimes (randomly) starts with the wrong (very low) resolution. In most cases this is only an aesthetic problem, but in some cases the user selection dialog is off the screen, making it impossible to log in.

I really don't know what package is at fault here, but it's pretty annoying so I'm reporting anyways. I also don't know if this is an upstream or integration issue, so please direct me to the correct place if this is not the right place to report this problem.

Additional info:
gdm 2.30-1
xorg-xserver 1.7-6-3
xf86-video-intel 2.10.0-1
extra/libxrandr 1.3.0-1

lspci
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 02)
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 02)
00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 02)
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 02)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 02)
00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 92)
00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 02)
00:1f.2 SATA controller: Intel Corporation ICH9M/M-E SATA AHCI Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 02)
02:01.0 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev ba)
02:01.1 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 04)
02:01.2 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 21)
09:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5756ME Gigabit Ethernet PCI Express
0c:00.0 Network controller: Intel Corporation Wireless WiFi Link 5100



Steps to reproduce:
Start computer or switch user or resume from suspend: gdm *sometimes* sets the resolution improperly
This task depends upon

Closed by  Jan de Groot (JGC)
Monday, 07 November 2011, 13:21 GMT
Reason for closing:  Fixed
Additional comments about closing:  And fixed again, patch was re-applied to linux-3.1, this time with reference to this bugreport.
Comment by Joël Schaerer (lardon) - Saturday, 24 April 2010, 13:19 GMT
I should add that I don't use an xorg.conf.
Comment by Ionut Biru (wonder) - Sunday, 25 April 2010, 11:52 GMT
gdm doesn't handle resolutions. xorg does.
Comment by Joël Schaerer (lardon) - Sunday, 25 April 2010, 18:30 GMT
Why doesn't the problem happen with my Gnome session then?
Comment by Jan de Groot (JGC) - Thursday, 23 December 2010, 08:57 GMT
I have this problem everyday. I fix it by logging in, closing the laptop lid and reopening it again. According to the logfiles, I have a TV attached with low resolution, so the driver puts the laptop display in clone mode with the same resolution as the ghost TV. This must be a bug in the kernel or the driver, it's not gdm's fault.
Comment by Joël Schaerer (lardon) - Thursday, 23 December 2010, 10:15 GMT
I suggest this bug be relabeled to [xorg] or something similar, as I know have the same problem with kdm. The X log files also incorrectly report that I have a TV attached to my laptop.
Comment by Jan de Groot (JGC) - Thursday, 20 January 2011, 21:31 GMT
This bug has been reported upstream, the report contains a possible fix for this issue which has not made it to the kernel yet.
https://bugzilla.kernel.org/show_bug.cgi?id=16236
Comment by Jan de Groot (JGC) - Saturday, 29 October 2011, 18:56 GMT
  • Field changed: Summary ([kernel26] i915 driver detects ghost TV output → [linux] i915 driver detects ghost TV output)
Reopened, as someone decided that the patch does not belong in linux 3.1.

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