Same issue with my 2010 MacBook Pro. I made a new post, but will add to this one. I noticed that it happened a lot with the updated Album Art screensaver... either when it was active or when I saw the preview in the control panel.
Also happened with some web sites viewed in Firefox... maybe Flash related.
I would have to say that it has some thing to do with the NVIDIA GPUs. I have a MacBook Pro Mid 2010 15 with a NVIDIA GeForce GT 330M 512 MB that crashes in Lion all the time. Screen flashes (not like on or off, but like turning off an old tv) and goes black with the keys lit up. Apple needs to fix this, but I do have to say that the gfxCardStatus method works. I have been running 100% perfectly with only using the on board Intel HD Graphics 288 MB GPU.
Same for me: I've already got black screen two times.
Unfortunately those two crashes happened in two different environments (during a long work session, and immediately after a sleep awake, so the MacBook Pro was totally cold), so I can't find out what is the reason of the crash.
MacBook Pro 2010 - i7 - 4GB - 15 inches
i have a 15" macbook pro, 2.8 c2d/8gb ram/512mb nvidia... i installed lion and it crashes LOTS. it crashes when sleeping or coming out of sleep (if im lucky it will come out of sleep) i like lion, but im going back to snow leopard tomorrow till they sort this out. Im not leaving my laptop sitting at 90c in standby just because apple hasnt fully sorted this OS out before release.
Interval Since Last Panic Report: 16952 sec
Panics Since Last Report: 2
Anonymous UUID: 534BBC72-9CDC-410E-98EA-B9AF6F179155
Sun Jul 24 13:32:53 2011
panic(cpu 1 caller 0xffffff7f809522bf): NVRM[0/1:0:0]: Read Error 0x0061021c: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xc0000000 0xffffff80a034a000 0x0a5480a2, D0, P2/4
Backtrace (CPU 1), Frame : Return Address
0xffffff807c77b210 : 0xffffff8000220702
0xffffff807c77b290 : 0xffffff7f809522bf
0xffffff807c77b320 : 0xffffff7f80a423fc
0xffffff807c77b370 : 0xffffff7f80c1d0f0
0xffffff807c77b400 : 0xffffff7f80930454
0xffffff807c77b520 : 0xffffff7f80932bbb
0xffffff807c77b5b0 : 0xffffff7f80932c84
0xffffff807c77b5f0 : 0xffffff7f80932ce1
0xffffff807c77b690 : 0xffffff7f809575e3
0xffffff807c77b880 : 0xffffff7f80959151
0xffffff807c77b960 : 0xffffff7f817cc008
0xffffff807c77b9a0 : 0xffffff7f817dae06
0xffffff807c77b9c0 : 0xffffff7f817f66d4
0xffffff807c77ba00 : 0xffffff7f817f6739
0xffffff807c77ba40 : 0xffffff7f817dec51
0xffffff807c77ba90 : 0xffffff7f81796753
Model: MacBookPro6,2, BootROM MBP61.0057.B0C, 2 processors, Intel Core i7, 2.66 GHz, 4 GB, SMC 1.58f16
Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 512 MB
Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (126.96.36.199.6)
Bluetooth: Version 2.5.0f17, 2 service, 19 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: Hitachi HTS545050B9SA02, 500,11 GB
Serial ATA Device: MATSHITADVD-R UJ-898
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 5
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8218, 0xfa113000 / 7
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0237, 0xfa120000 / 4
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfa130000 / 3
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: Built-in iSight, apple_vendor_id, 0x8507, 0xfd110000 / 4
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 3
Same issue 2010 MBP i7 4GB ram and 7200rpm drive. Never had a problem until a fresh install of Lion on a fresh drive - now has hit me over 5 times. Pretty consistently the last entry in console is:
7/24/11 10:29:28.835 AM [0x0-0x24024].com.apple.iTunes: The plugin 'Quartz Composer Visualizer' failed to load because it has the wrong CPU architecture for this version of iTunes. (3585)
To Apple: In reference to the next patch for Lion, all I have to say is, "SHIP IT."
I get the reboot screen a lot. I'm running a 13" MacBook Pro 2.26GHz Core2 Duo, 4GB RAM, graphics card is NVIDIA 9400M. So far, I've tried:
* Repair disk and repair volume
* Repair permissions
* Integrated mode with gfxCardStatus
Each time, I thought I got a little relief, but it always comes back. I've given up for now (always have a recent backup with Time Machine, folks!!!!!).
One annoying thing that didn't restore properly (I suspect a p-RAM setting got changed): my Logitech bluetooth travel mouse now constantly gets "Connection Lost" if I haven't clicked it for 38 seconds. I'm not in the mood at the moment to reset p-RAM (you know how it is when you get things the way you like ... too bad Time Machine doesn't back up p-RAM!).
I did try Lion on a freshly installed Snow Leopard partition, and didn't hit any crashes with that, but that's not exactly the scenario I need to work.
Sure hope they have an update soon. I do like a lot of Lion's new features.
Just another update: using Integrated Mode in gfxcardstatus for two days now and am crash-free. I think this is definitely pointing to an nVidia driver problem.
Apple I hope you are still working diligently on this. I didn't pay over two thousand dollars to use the Intel Integrated graphics on my MBP!