Radeon_Dead

[borgward]

27" iMac mid 2011, AMD Radeon HD 6770M, 88GB Ram, Quad Core 2.7 GHz Intel Core i5.
I ran Linuxmint 20.1 64bit live session on the above because I suspected the Raedon GPU was dead. Well known issue that if the GPU is dead,
the system will boot and display video but hangs before login. I was able to boot Linux live session and had video, even watched YouTube. Either the GPU is not dead or Linux is using some minimal video chip or else the processor is producing the video. Any idea about how Linux is running the video? Considering installing on the internal drive or running from external USB drive. This machine is a freebie. I would never consider buying a Mac - highly unreliable hardware that is very difficult to repair.

[Pjotr]

Please post the output of:

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inxi -Fxpmrz

and:

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inxi -G

[borgward]

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To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

mint@mint:~$ inxi -Fxpmrz
System:    Kernel: 5.4.0-58-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 Desktop: Cinnamon 4.8.5 
           Distro: Linux Mint 20.1 Ulyssa base: Ubuntu 20.04 focal 
Machine:   Type: Desktop System: Apple product: iMac12,2 v: 1.0 serial: <filter> 
           Mobo: Apple model: Mac-942B59F58194171B v: iMac12,2 serial: <filter> BIOS: Apple v: IM121.88Z.004D.B00.1708080012 
           date: 08/08/17 
Memory:    RAM: total: 7.75 GiB used: 1.17 GiB (15.1%) 
           RAM Report: permissions: Unable to run dmidecode. Root privileges required. 
CPU:       Topology: Quad Core model: Intel Core i5-2500S bits: 64 type: MCP arch: Sandy Bridge rev: 7 L2 cache: 6144 KiB 
           flags: avx lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 21550 
           Speed: 1617 MHz min/max: 1600/3700 MHz Core speeds (MHz): 1: 1596 2: 1596 3: 1596 4: 1596 
Graphics:  Device-1: Advanced Micro Devices [AMD/ATI] Whistler [Radeon HD 6730M/6770M/7690M XT] vendor: Apple driver: radeon 
           v: kernel bus ID: 01:00.0 
           Display: x11 server: X.Org 1.20.8 driver: ati,radeon unloaded: fbdev,modesetting,vesa resolution: 2560x1440~60Hz 
           OpenGL: renderer: AMD TURKS (DRM 2.50.0 / 5.4.0-58-generic LLVM 10.0.0) v: 3.3 Mesa 20.0.8 direct render: Yes 
Audio:     Device-1: Intel 6 Series/C200 Series Family High Definition Audio driver: snd_hda_intel v: kernel bus ID: 00:1b.0 
           Device-2: AMD Turks HDMI Audio [Radeon HD 6500/6600 / 6700M Series] vendor: Apple driver: snd_hda_intel v: kernel 
           bus ID: 01:00.1 
           Sound Server: ALSA v: k5.4.0-58-generic 
Network:   Device-1: Broadcom and subsidiaries NetXtreme BCM57765 Gigabit Ethernet PCIe driver: tg3 v: 3.137 port: 2000 
           bus ID: 02:00.0 
           IF: enp2s0 state: down mac: <filter> 
           Device-2: Qualcomm Atheros AR93xx Wireless Network Adapter vendor: Apple AirPort Extreme driver: ath9k v: kernel 
           port: 2000 bus ID: 03:00.0 
           IF: wlp3s0 state: up mac: <filter> 
Drives:    Local Storage: total: 931.51 GiB used: 82.4 MiB (0.0%) 
           ID-1: /dev/sda vendor: Seagate model: ST31000528AS size: 931.51 GiB temp: 23 C 
Partition: ID-1: / size: 3.88 GiB used: 82.4 MiB (2.1%) fs: overlay source: ERR-102 
           ID-2: /rofs raw size: 1.78 GiB size: <superuser/root required> used: <superuser/root required> fs: squashfs 
           dev: /dev/loop0 
Sensors:   System Temperatures: cpu: 32.0 C mobo: N/A 
           Fan Speeds (RPM): cpu: 939 
Repos:     Active apt repos in: /etc/apt/sources.list 
           1: deb cdrom:[Linux Mint 20.1 _Ulyssa_ - Release amd64 20210103]/ focal contrib main
           Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
           1: deb http://packages.linuxmint.com ulyssa main upstream import backport #id:linuxmint_main
           2: deb http://archive.ubuntu.com/ubuntu focal main restricted universe multiverse
           3: deb http://archive.ubuntu.com/ubuntu focal-updates main restricted universe multiverse
           4: deb http://archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse
           5: deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
           6: deb http://archive.canonical.com/ubuntu/ focal partner
Info:      Processes: 203 Uptime: 10m Init: systemd runlevel: 5 Compilers: gcc: 9.3.0 Shell: bash v: 5.0.17 inxi: 3.0.38 
mint@mint:~$ 

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mint@mint:~$ inxi -G
Graphics:  Device-1: Advanced Micro Devices [AMD/ATI] Whistler [Radeon HD 6730M/6770M/7690M XT] driver: radeon v: kernel 
           Display: x11 server: X.Org 1.20.8 driver: ati,radeon unloaded: fbdev,modesetting,vesa resolution: 2560x1440~60Hz 
           OpenGL: renderer: AMD TURKS (DRM 2.50.0 / 5.4.0-58-generic LLVM 10.0.0) v: 3.3 Mesa 20.0.8

[MiZoG]

Everything looks good

[borgward]

radeon unloaded? What does that mean? It's not using the Raedon?

[DPM]

radeon unloaded? What does that mean? It's not using the Raedon?

It means:

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driver: ati,radeon
unloaded: fbdev,modesetting,vesa

So, it is using the ATI Radeon driver, not the others. Also the next line with OpenGL is how it should be.

[borgward]

Sounds like the GPU is good but they are telling me it is bad so I can spend up to $200 for the part plus 2+ hours replacing it or buy a new Mac. Will fool around w/their system restore to see if it will boot to the Mac OS. If it boots to Mac I might dual boot it with Linux. It's that or Linux all the way.

[borgward]

how do I interpret glmark2 Score? Is it relative to particular GPU being stress tested?
AMD Radeon HD 6770M
glmark2 Score: 1967