I’m running Ubuntu 12.04 on Lenovo Y500 with 2x750m graphics. Second graphic is in ultrabay slot. I’m running latest 319.23 drivers. When I check Nvidia X settings both cards are listed but only one used. I tried adding --sli=on and multigpu=auto but after this X doesn’t boot. When I installed Ubuntu at first it could not boot installation, after I removed second graphic all went smooth. SLI works under Windows 7. I disabled EFI I don’t know if it is relevant. Log attached
nvidia-bug-report.log.gz (83.1 KB)
Your log file doesn’t show anything wrong, but it also looks like it was generated with SLI disabled. Can you please generate a bug report log after failing to start X with SLI enabled?
Log attached. X failed to boot with sli=on, after that I removed second graphic card and generated report
nvidia-bug-report.log.gz (70.9 KB)
It looks like your single-GPU log file overwrote the failing one, and there doesn’t seem to be a /var/log/Xorg.0.log.old so I can’t tell why it’s failing.
When you say “X failed to boot,” what exactly do you mean? Are you presented with a text-mode login prompt that you could use to log in and generate the bug report? If you have a second computer, can you try connecting to the failing one with SSH to generate the bug report log?
I don’t have any text, just black screen and hdd light flashes. It looks like kernel panic. I’m currently on 3.5.0-32 kernel. Should I try 3.8 or 3.9 kernel?
It can’t hurt, since you can presumably always roll back to the older kernel if it doesn’t work. Do older drivers work?
I’m running out of ideas. I tried both 3.8 and 3.9 latest build kernels no luck. Older drivers work until version experimental 310. I’ve tried 304, 310 and 313. Version 310 recognize only one GPU and it was recognized as N14P-GT. Not sure is there any additional log I could sent you
Here is output of lspci:
00:00.0 Host bridge: Intel Corporation Ivy Bridge DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Ivy Bridge PCI Express Root Port (rev 09)
00:01.1 PCI bridge: Intel Corporation Ivy Bridge PCI Express Root Port (rev 09)
00:14.0 USB controller: Intel Corporation Panther Point USB xHCI Host Controller (rev 04)
00:16.0 Communication controller: Intel Corporation Panther Point MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation Panther Point USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation Panther Point High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 1 (rev c4)
00:1c.1 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 2 (rev c4)
00:1c.3 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 4 (rev c4)
00:1d.0 USB controller: Intel Corporation Panther Point USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation Panther Point LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation Panther Point 6 port SATA Controller [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation Panther Point SMBus Controller (rev 04)
01:00.0 VGA compatible controller: NVIDIA Corporation Device 0fe4 (rev a1)
01:00.1 Audio device: NVIDIA Corporation Device 0e1b (rev a1)
02:00.0 3D controller: NVIDIA Corporation Device 0fe4 (rev a1)
03:00.0 Ethernet controller: Atheros Communications Inc. AR8161 Gigabit Ethernet (rev 10)
04:00.0 Network controller: Intel Corporation Centrino Wireless-N 2230 (rev c4)
05:00.0 System peripheral: JMicron Technology Corp. SD/MMC Host Controller (rev 30)
05:00.2 SD Host controller: JMicron Technology Corp. Standard SD Host Controller (rev 30)
05:00.3 System peripheral: JMicron Technology Corp. MS Host Controller (rev 30)
05:00.4 System peripheral: JMicron Technology Corp. xD Host Controller (rev 30)
3D controller: NVIDIA Corporation Device 0fe4 (rev a1) is the one I’m having issue with
I’ve attached Xorg log when SLI enabled and kernel log
Xorg.0.log.gz (2.11 KB)
kern.log.gz (632 KB)
I’ve tried latest drivers 319.32. Same results. No solution yet
I’ve attached latest bug report with beta drivers 325.08. I used SLI=on and I can normally boot but second GPU is ignored. It is listed in nvidia X server settings but it is not used. Previously every driver I used with SLI=on gave me kernel panic.
nvidia-bug-report.log.gz (84.9 KB)
This has been a known issue with laptop SLI for over a year now. Laptop SLI is effectively unsupported in Linux. Nvidia has said before that they can reproduce it, but it seems to be a very low priority bug. Unless you plan on using Windows a lot on the laptop, I’d suggest selling your second graphics card before the price goes down.
Internally filed bug 1338170 to track this issue.